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  • Temperature-switching logic in MoS 2 single transistors
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Xiaozhang Chen, Lehua Gu, Lan Liu, Huawei Chen, Jingyu Li, Chunsen Liu and Peng Zhou

    Due to their unique characteristics, two-dimensional (2D) materials have drawn great attention as promising candidates for the next generation of integrated circuits, which generate a calculation unit with a new working mechanism, called a logic transistor. To figure out the application prospects of logic transistors, exploring the temperature dependence of logic characteristics is important. In this

    更新日期:2020-09-14
  • Hybrid vector beams with non-uniform orbital angular momentum density induced by designed azimuthal polarization gradient
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Lei Han, Shuxia Qi, Sheng Liu, Peng Li, Huachao Cheng and Jianlin Zhao

    Based on angular amplitude modulation of orthogonal base vectors in common-path interference method, we propose an interesting type of hybrid vector beams with unprecedented azimuthal polarization gradient and demonstrate in experiment. Geometrically, the configured azimuthal polarization gradient is indicated by intriguing mapping tracks of angular polarization states on Poincaré sphere, more than

    更新日期:2020-09-14
  • Multi-functional vanadium dioxide integrated metamaterial for terahertz wave manipulation
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Jian-Xing Zhao, Jian-Lin Song, Yao Zhou, Rui-Long Zhao, Yi-Chao Liu and Jian-Hong Zhou

    We proposed a vanadium dioxide (VO 2 )-integrated multi-functional metamaterial structure that consists of three metallic grating layers and two VO 2 films separated by SiO 2 dielectric spacers. The proposed structure can be flexibly switched among three states by adjusting temperature, incident direction, and polarization. In state 1, the incident wave is strongly transmitted and perfectly converted

    更新日期:2020-09-14
  • Room-temperature electric control of exchange bias effect in CoO 1 – δ /Co films using Pb(Mg 1/3 Nb 2/3 ) 0.7 Ti 0.3 O 3 (110) substrates
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Xin Wen, Rui Wu, Wen-Yun Yang, Chang-Sheng Wang, Shun-Quan Liu, Jing-Zhi Han and Jin-Bo Yang

    Significant electric control of exchange bias effect in a simple CoO 1– δ /Co system, grown on piezoelectric Pb(Mg 1/3 Nb 2/3 ) 0.7 Ti 0.3 O 3 (110) (PMN-PT) substrates, is achieved at room temperature. Obvious changes in both the coercivity field ( H C ) and the exchange bias field ( H E ), of 31% and 5%, respectively, have been observed when the electric field is applied to the substrate. While the

    更新日期:2020-09-14
  • Recent advances, perspectives, and challenges in ferroelectric synapses
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Bo-Bo Tian, Ni Zhong and Chun-Gang Duan

    The multiple ferroelectric polarization tuned by external electric field could be used to simulate the biological synaptic weight. Ferroelectric synaptic devices have two advantages compared with other reported ones: One is that the intrinsic switching of ferroelectric domains without invoking of defect migration as in resistive oxides, contributes reliable performance in these ferroelectric synapses

    更新日期:2020-09-14
  • A synaptic transistor with NdNiO 3
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Xiang Wang, Chen Ge, Ge Li, Er-Jia Guo, Meng He, Can Wang, Guo-Zhen Yang and Kui-Juan Jin

    Recently, neuromorphic devices for artificial intelligence applications have attracted much attention. In this work, a three-terminal electrolyte-gated synaptic transistor based on NdNiO 3 epitaxial films, a typical correlated electron material, is presented. The voltage-controlled metal–insulator transition was achieved by inserting and extracting H + ions in the NdNiO 3 channel through electrolyte

    更新日期:2020-09-14
  • First-principles study of magnetism of 3d transition metals and nitrogen co-doped monolayer MoS 2
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Long Lin, Yi-Peng Guo, Chao-Zheng He, Hua-Long Tao, Jing-Tao Huang, Wei-Yang Yu, Rui-Xin Chen, Meng-Si Lou and Long-Bin Yan

    The electronic structures and magnetic properties of diverse transition metal ( TM = Fe, Co, and Ni) and nitrogen (N) co-doped monolayer MoS 2 are investigated by using density functional theory. The results show that the intrinsic MoS 2 does not have magnetism initially, but doped with TM ( TM = Fe, Co, and Ni) the MoS 2 possesses an obvious magnetism distinctly. The magnetic moment mainly comes from

    更新日期:2020-09-14
  • Visible-light all-fiber vortex lasers based on mode selective couplers
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Chuchu Dong, Jinhai Zou, Hongjian Wang, Han Yao, Xianglong Zeng, Yikun Bu and Zhengqian Luo

    We demonstrate visible-light all-fiber vortex lasers by incorporating the home-made mode selective couplers (MSCs). The MSC at green or red wavebands is fabricated by specially designing and fusing a single-mode fiber (SMF) and a few-mode fiber (FMF). The MSCs inserted into visible fiber cavities act as power splitters and mode converters from the LP 01 to LP 11 mode at green and red wavelengths, respectively

    更新日期:2020-09-14
  • Evolution of electrical and magnetotransport properties with lattice strain in La 0.7 Sr 0.3 MnO 3 film
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Zhi-Bin Ling, Qing-Ye Zhang, Cheng-Peng Yang, Xiao-Tian Li, Wen-Shuang Liang, Yi-Qian Wang, Huai-Wen Yang and Ji-Rong Sun

    In this paper, we investigate the effects of lattice strain on the electrical and magnetotransport properties of La 0.7 Sr 0.3 MnO 3 (LSMO) films by changing film thickness and substrate. For electrical properties, a resistivity upturn emerges in LSMO films, i.e. , LSMO/STO and LSMO/LSAT with small lattice strain at a low temperature, which originates from the weak localization effect. Increasing film

    更新日期:2020-09-14
  • Tuning magnetic anisotropy by interfacial engineering in La 2/3 Sr 1/3 Co 1 – x Mn x O 2.5 + δ /La 2/3 Sr 1/3 MnO 3 /La 2/3 Sr 1/3 Co 1 – x Mn x O<...
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-13
    Hai-Lin Huang, Liang Zhu, Hui Zhang, Jin-E Zhang, Fu-Rong Han, Jing-Hua Song, Xiaobing Chen, Yuan-Sha Chen, Jian-Wang Cai, Xue-Dong Bai, Feng-Xia Hu, Bao-Gen Shen and J-Rong Sun

    Grouping different oxide materials with coupled charge, spin, and orbital degrees of freedom together to form heterostructures provides a rich playground to explore the emergent interfacial phenomena. The perovskite/brownmillerite heterostructure is particularly interesting since symmetry mismatch may produce considerable interface reconstruction and unexpected physical effects. Here, we systemically

    更新日期:2020-09-14
  • Anisotropy of Ca 0.73 La 0.27 (Fe 0.96 Co 0.04 )As 2 studied by torque magnetometry
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Ya-Lei Huang, Run Yang, Pei-Gang Li and Hong Xiao

    Torque measurements were performed on single crystal samples of Ca 0.73 La 0.27 (Fe 0.96 Co 0.04 )As 2 in both the normal and superconducting states. Contributions to the torque signal from the paramagnetism and the vortex lattice were identified. The superconducting anisotropy parameter γ was determined from the reversible part of the vortex contribution based on Kogan's model. It is found that γ

    更新日期:2020-09-11
  • Flattening is flattering: The revolutionizing 2D electronic systems
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Baojuan Dong, Teng Yang and Zheng Han

    Two-dimensional (2D) crystals are known to have no bulk but only surfaces and edges, thus leading to unprecedented properties thanks to the quantum confinements. For half a century, the compression of z -dimension has been attempted through ultra-thin films by such as molecular beam epitaxy. However, the revisiting of thin films becomes popular again, in another fashion of the isolation of freestanding

    更新日期:2020-09-11
  • Two ultra-stable novel allotropes of tellurium few-layers
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Changlin Yan, Cong Wang, Linwei Zhou, Pengjie Guo, Kai Liu, Zhong-Yi Lu, Zhihai Cheng, Yang Chai, Anlian Pan and Wei Ji

    At least four two- or quasi-one-dimensional allotropes and a mixture of them were theoretically predicted or experimentally observed for low-dimensional Te, namely the α , β , γ , δ , and chiral- α + δ phases. Among them the γ and α phases were found to be the most stable phases for monolayer and thicker layers, respectively. Here, we found two novel low-dimensional phases, namely the ε and ζ phases

    更新日期:2020-09-11
  • Active metasurfaces for manipulatable terahertz technology
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Jing-Yuan Wu, Xiao-Feng Xu and Lian-Fu Wei

    Metasurface is a kind of two-dimensional metamaterial with specially designed sub-wavelength unit cells. It consists of single-layer or few-layer stacks of planar structures and possesses certain superior abilities to manipulate the propagating electromagnetic waves, including the terahertz (THz) ones. Compared with the usual passive THz metasurfaces whose optical properties are difficult to be controlled

    更新日期:2020-09-11
  • Directed transport of coupled Brownian motors in a two-dimensional traveling-wave potential
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Wei-Xia Wu, Zhi-Gang Zheng, Yan-Li Song, Ying-Rong Han, Zhi-Cheng Sun and Chen-Pu Li

    Considering an elastically coupled Brownian motors system in a two-dimensional traveling-wave potential, we investigate the effects of the angular frequency of the traveling wave, wavelength, coupling strength, free length of the spring, and the noise intensity on the current of the system. It is found that the traveling wave is the essential condition of the directed transport. The current is dominated

    更新日期:2020-09-11
  • Improved electrical properties of NO-nitrided SiC/SiO 2 interface after electron irradiation
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Ji-Long Hao, Yun Bai, Xin-Yu Liu, Cheng-Zhan Li, Yi-Dan Tang, Hong Chen, Xiao-Li Tian, Jiang Lu and Sheng-Kai Wang

    Effective improvement in electrical properties of NO passivated SiC/SiO 2 interface after being irradiated by electrons is demonstrated. The density of interface traps after being irradiated by 100-kGy electrons decreases by about one order of magnitude, specifically, from 3×10 12 cm −2 ⋅eV −1 to 4×10 11 cm −2 ⋅eV −1 at 0.2 eV below the conduction band of 4H-SiC without any degradation of electric

    更新日期:2020-09-11
  • Review of resistive switching mechanisms for memristive neuromorphic devices
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Rui Yang

    Memristive devices have attracted intensive attention in developing hardware neuromorphic computing systems with high energy efficiency due to their simple structure, low power consumption, and rich switching dynamics resembling biological synapses and neurons in the last decades. Fruitful demonstrations have been achieved in memristive synapses neurons and neural networks in the last few years. Versatile

    更新日期:2020-09-11
  • Raman and infrared spectra of complex low energy tetrahedral carbon allotropes from first-principles calculations
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Hui Wang, Ze-Yu Zhang, Xiao-Wu Cai, Zi-Han Liu, Yong-Xiang Zhang, Zhen-Long Lv, Wei-Wei Ju, Hui-Hui Liu, Tong-Wei Li, Gang Liu, Hai-Sheng Li, Hai-Tao Yan and Min Feng

    Up to now, at least 806 carbon allotropes have been proposed theoretically. Three interesting carbon allotropes (named Pbam -32, P 6/ mmm , and ##IMG## [http://ej.iop.org/images/1674-1056/29/9/093601/cpb_29_9_093601_ieqn1.gif] {$I\bar{4}3d$} ) were recently uncovered based on a random sampling strategy combined with space group and graph theory. The calculation results show that they are superhard

    更新日期:2020-09-11
  • Calibration of a compact absolute atomic gravimeter
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Hong-Tai Xie, Bin Chen, Jin-Bao Long, Chun Xue, Luo-Kan Chen and Shuai Chen

    Compact atomic gravimeters are the potential next generation precision instruments for gravity survey from fundamental research to broad field applications. We report the calibration results of our home build compact absolute atomic gravimeter USTC-AG02 at Changping Campus, the National Institute of Metrology (NIM), China in January 2019. The sensitivity of the atomic gravimeter reaches ##IMG## [http://ej

    更新日期:2020-09-11
  • Novel compact and lightweight coaxial C-band transit-time oscillator
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Xiao-Bo Deng, Jun-Tao He, Jun-Pu Ling, Bing-Fang Deng, Li-Li Song, Fu-Xiang Yang and Wei-Li Xu

    Compactness and miniaturization have become increasingly important in the development of high-power microwave devices. Based on this rising demand, a novel C-band coaxial transit-time oscillator (TTO) with a low external guiding magnetic field is proposed and analyzed. The proposed device has the following advantages: simple structure, short axial length, high power conversion efficiency, and low external

    更新日期:2020-09-11
  • Crystallization and characteristics of {100}-oriented diamond with CH 4 N 2 S additive under high pressure and high temperature
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Yong Li, Debing Tan, Qiang Wang, Zhengguo Xiao, Changhai Tian and Lin Chen

    Diamond crystallization was carried out with CH 4 N 2 S additive in the FeNiCo-C system at pressure 6.0 GPa and temperature ranging from 1290 °C to 1300 °C. The crystallization qualities of the synthetic crystals were characterized by Raman spectra and the Raman peaks located at 1331 cm −1 . Fourier transform infrared (FTIR) results showed that the hydrogen-related absorption peak of the as-grown diamond

    更新日期:2020-09-11
  • Research of influence of the additional electrode on Hall thruster plume by particle-in-cell simulation
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Xi-Feng Cao, Hui Liu and Da-Ren Yu

    Hall thruster is an electric propulsion device for attitude control and position maintenance of satellites. The discharge process of Hall thruster will produce divergent plume. The plume will cause erosion, static electricity, and other interference to the main components, such as solar sailboard, satellite body, and thruster. Therefore, reducing the divergence of the plume is an important content

    更新日期:2020-09-11
  • Recent advances in generation of terahertz vortex beams and their applications
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Honggeng Wang, Qiying Song, Yi Cai, Qinggang Lin, Xiaowei Lu, Huangcheng Shangguan, Yuexia Ai and Shixiang Xu

    Last decade has witnessed a rapid development of the generation of terahertz (THz) vortex beams as well as their wide applications, mainly due to their unique combination characteristics of regular THz radiation and orbital angular momentum (OAM). Here we have reviewed the ways to generate THz vortex beams by two representative scenarios, i.e., THz wavefront modulation via specific devices, and direct

    更新日期:2020-09-10
  • Movable precision gravimeters based on cold atom interferometry
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Jiong-Yang Zhang, Le-Le Chen, Yuan Cheng, Qin Luo, Yu-Biao Shu, Xiao-Chun Duan, Min-Kang Zhou and Zhong-Kun Hu

    High precision atom interferometers have shown attractive prospects in laboratory for testing fundamental physics and inertial sensing. Efforts on applying this innovative technology to field applications are also being made intensively. As the manipulation of cold atoms and related matching technologies mature, inertial sensors based on atom interferometry can be adapted to various indoor or mobile

    更新日期:2020-09-10
  • Precision measurements with cold atoms and trapped ions
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Qiuxin Zhang, Yirong Wang, Chenhao Zhu, Yuxin Wang, Xiang Zhang, Kuiyi Gao and Wei Zhang

    Recent progresses on quantum control of cold atoms and trapped ions in both the scientific and technological aspects greatly advance the applications in precision measurement. Thanks to the exceptional controllability and versatility of these massive quantum systems, unprecedented sensitivity has been achieved in clocks, magnetometers, and interferometers based on cold atoms and ions. Besides, these

    更新日期:2020-09-10
  • Recent progress in graphene terahertz modulators
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-09
    Xieyu Chen, Zhen Tian, Quan Li, Shaoxian Li, Xueqian Zhang, Chunmei Ouyang, Jianqiang Gu, Jiaguang Han and Weili Zhang

    Graphene has been recognized as a promising candidate in developing tunable terahertz (THz) functional devices due to its excellent optical and electronic properties, such as high carrier mobility and tunable conductivity. Here, we review graphene-based THz modulators we have recently developed. First, the optical properties of graphene are discussed. Then, graphene THz modulators realized by different

    更新日期:2020-09-10
  • Pre-warning information dissemination models of different media under emergencies
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-06
    Anying Chen, Haoran Zhu, Xiaoyong Ni and Guofeng Su

    Pre-warning plays an important role in emergency handling, especially in urban areas with high population density like Beijing. Knowing the information dissemination mechanisms clearly could help us reduce losses and ensure the safety of human beings during emergencies. In this paper, we propose the models of pre-warning information dissemination via five classical media based on actual pre-warning

    更新日期:2020-09-08
  • Some experimental schemes to identify quantum spin liquids
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-06
    Yonghao Gao and Gang Chen

    Despite the apparent ubiquity and variety of quantum spin liquids in theory, experimental confirmation of spin liquids remains to be a huge challenge. Motivated by the recent surge of evidences for spin liquids in a series of candidate materials, we highlight the experimental schemes, involving the thermal Hall transport and spectrum measurements, that can result in smoking-gun signatures of spin liquids

    更新日期:2020-09-08
  • The drying of liquid droplets
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-06
    Zechao Jiang, Xiuyuan Yang, Mengmeng Wu and Xingkun Man

    The drying of liquid droplets is a common phenomenon in daily life, and has long attracted special interest in scientific research. We propose a simple model to quantify the shape evolution of drying droplets. The model takes into account the friction constant between the contact line (CL) and the substrate, the capillary forces, and the evaporation rate. Two typical evaporation processes observed

    更新日期:2020-09-08
  • Surface-regulated triangular borophene as Dirac-like materials from density functional calculation investigation
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-06
    Wenyu Fang, Wenbin Kang, Jun Zhao and Pengcheng Zhang

    By applying the first principles calculations combined with density functional theory (DFT), this study explored the optical properties, electronic structure, and structure stability of triangular borophene decorated chemically, B 3 X ( X = F, Cl) in a systematical manner. As revealed from the results of formation energy, phonon dispersion, and molecular dynamics simulation study, all the borophene

    更新日期:2020-09-08
  • A 3D biophysical model for cancer spheroid cell-enhanced invasion in collagen-oriented fiber microenvironment
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-06
    Miaomiao Hai, Yanping Liu, Ling Xiong, Guoqiang Li, Gao Wang, Hongfei Zhang, Jianwei Shuai, Guo Chen and Liyu Liu

    The process of in situ tumors developing into malignant tumors and exhibiting invasive behavior is extremely complicated . From a biophysical point of view, it is a phase change process affected by many factors, including cell-to-cell, cell-to-chemical material, cell-to-environment interaction, etc . In this study, we constructed spheroids based on green fluorescence metastatic breast cancer cells

    更新日期:2020-09-08
  • Fabrication and performance evaluation of GaN thermal neutron detectors with 6 LiF conversion layer
    Chin. Phys. B (IF 1.223) Pub Date : 2020-09-06
    Zhifu Zhu, Zhijia Sun, Jijun Zou, Bin Tang, Qinglei Xiu, Renbo Wang, Jinhui Qu, Wenjuan Deng, Shaotang Wang, Junbo Peng, Zhidong Wang, Bin Tang and Haiping Zhang

    A GaN-based pin neutron detector with a 6 LiF conversion layer was fabricated, and can be used to detect thermal neutrons. Measurement of the electrical characteristic of the GaN-based pin neutron detector showed that the reverse leakage current of the neutron detector was reduced significantly after deposition of a 6 LiF conversion layer on the detector surface. The thermal neutrons used in this experiment

    更新日期:2020-09-08
  • High performance Cu 2 O film/ZnO nanowires self-powered photodetector by electrochemical deposition
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Deshuang Guo, Wei Li, Dengkui Wang, Bingheng Meng, Dan Fang and Zhipeng Wei

    Self-powered photodetectors based on nanomaterials have attracted lots of attention for several years due to their various advantages. In this paper, we report a high performance Cu 2 O/ZnO self-powered photodetector fabricated by using electrochemical deposition. ZnO nanowires arrays grown on indium-tin-oxide glass are immersed in Cu 2 O film to construct type-II band structure. The Cu 2 O/ZnO photodetector

    更新日期:2020-09-02
  • A novel method of constructing high-dimensional digital chaotic systems on finite-state automata
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Jun Zheng and Han-Ping Hu

    When chaotic systems are implemented on finite precision machines, it will lead to the problem of dynamical degradation. Aiming at this problem, most previous related works have been proposed to improve the dynamical degradation of low-dimensional chaotic maps. This paper presents a novel method to construct high-dimensional digital chaotic systems in the domain of finite computing precision. The model

    更新日期:2020-09-02
  • Resonance-enhanced two-photon ionization of hydrogen atom in intense laser field investigated by Bohmian-mechanics
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Yang Song, Shu Han, Yu-Jun Yang, Fu-Ming Guo and Su-Yu Li

    Resonance enhanced two-photon ionization process of hydrogen atom via the resonant laser pulse is studied by Bohmian mechanics (BM) method. By analyzing the trajectories and energies of Bohmian particles (BPs), we find that under the action of high frequency and low intensity multi-circle resonant laser pulses, the ionized BPs first absorb one photon completing the excitation, and then absorb another

    更新日期:2020-09-02
  • Gaussian process tomography based on Bayesian data analysis for soft x-ray and AXUV diagnostics on EAST
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Yan Chao, Liqing Xu, Liqun Hu, Yanmin Duan, Tianbo Wang, Yi Yuan and Yongkuan Zhang

    This work presents the Gaussian process tomography (GPT) based on Bayesian data analysis and its applications in soft x-ray (SXR) and absolute extreme ultraviolet spectroscopy (AXUV) diagnostics on experimental advanced superconducting tokamak (EAST). This is the first application of the GPT method in the AXUV diagnostic system in fusion devices. It is found that even if only horizontal detector arrays

    更新日期:2020-09-02
  • Effects of temperature and pressure on OH laser-induced fluorescence exciting A–X (1,0) transition at high pressures
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Xiaobo Tu, Linsen Wang, Xinhua Qi, Bo Yan, Jinhe Mu and Shuang Chen

    The effects of temperature and pressure on laser-induced fluorescence (LIF) of OH are numerically studied under the excitation of A–X (1,0) transition at high pressures. A detailed theoretical analysis is carried out to reveal the physical processes of LIF. It is shown that high pressure LIF measurements get greatly complicated by the variations of pressure- and temperature-dependent parameters, such

    更新日期:2020-09-02
  • Photoelectron imaging on vibrational excitation and Rydberg intermediate states in multi-photon ionization process of NH 3 molecule
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Ya-Nan Sun, Yan-Hui Wang, Le-Le Song, Hai-Bin Du, Xiao-Chun Wang, Lan-Lai He, Si-Zuo Luo, Qin Yang, Jing Leng and Fu-Chun Liu

    The ionization processes of NH 3 molecule are studied by photoelectron velocity map imaging technique in a linearly polarized 400-nm femtosecond laser field. The two-dimensional photoelectron images from ammonia molecules under different laser intensities are obtained. In the slow electron region, the values of kinetic energy of photoelectrons corresponding to peaks 1, 2, 3, and 4 are 0.27, 0.86, 1

    更新日期:2020-09-02
  • Study of optical clocks based on ultracold 171 Yb atoms
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Di Ai, Hao Qiao, Shuang Zhang, Li-Meng Luo, Chang-Yue Sun, Sheng Zhang, Cheng-Quan Peng, Qi-Chao Qi, Tao-Yun Jin, Min Zhou and Xin-Ye Xu

    The optical atomic clocks have the potential to transform global timekeeping, relying on the state-of-the-art accuracy and stability, and greatly improve the measurement precision for a wide range of scientific and technological applications. Herein we report on the development of the optical clock based on 171 Yb atoms confined in an optical lattice. A minimum width of 1.92-Hz Rabi spectra has been

    更新日期:2020-09-02
  • Enhanced circular dichroism of TDBC in a metallic hole array structure
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Tiantian He, Qihui Ye and Gang Song

    We investigate the enhanced chirality of chiral molecular J-aggregates (TDBC) by the propagating surface plasmons (PSPs) in the metallic hole array structure filled with TDBC. The two ends of the hole in the metal film form a low quality factor Fabry–Perot (FP) cavity, and this cavity confines PSPs. The resonant wavelength of the metallic hole array is tuned by the lattice constant and the size of

    更新日期:2020-09-02
  • Charge transfer in low-energy collisions of Be 3+ and B 4+ ions with He
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Kun Wang, Yi-Zhi Qu, Chun-Hua Liu, Ling Liu, Yong Wu, H P Liebermann and Robert J. Buenker

    The nonradiative charge-transfer processes of Be 3+ (1s)/B 4+ (1s) colliding with He(1s 2 ) are investigated by the quantum-mechanical molecular orbital close-coupling (QMOCC) method from 10 eV/u to 1800 eV/u. Total and state-selective cross sections are obtained and compared with other results available. Although the incident ions have the same number of electrons and collide with the same target

    更新日期:2020-09-02
  • Analysis of overload-based cascading failure in multilayer spatial networks
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Min Zhang, Xiao-Juan Wang, Lei Jin, Mei Song and Zhong-Hua Liao

    Many complex networks in real life are embedded in space and most infrastructure networks are interdependent, such as the power system and the transport network. In this paper, we construct two cascading failure models on the multilayer spatial network. In our research, the distance l between nodes within the layer obeys the exponential distribution P ( l ) ∼ exp(– l / ζ ), and the length r of dependency

    更新日期:2020-09-02
  • Acetone sensors for non-invasive diagnosis of diabetes based on metal–oxide–semiconductor materials
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Yujie Li, Min Zhang and Haiming Zhang

    In recent years, clinical studies have found that acetone concentration in exhaled breath can be taken as a characteristic marker of diabetes. Metal–oxide–semiconductor (MOS) materials are widely used in acetone gas sensors due to their low cost, high sensitivity, fast response/recovery time, and easy integration. This paper reviews recent progress in acetone sensors based on MOS materials for diabetes

    更新日期:2020-09-02
  • Temperature-dependent barrier height inhomogeneities in PTB7:PC 71 BM-based organic solar cells
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Brahim Ait Ali, Reda Moubah, Abdelkader Boulezhar and Hassan Lassri

    We report on the temperature-dependent Schottky barrier in organic solar cells based on PTB7:PC 71 BM. The ideality factor is found to increase with temperature decreasing, which is explained by a model in which the solar cell is taken as Schottky barrier diode. Accordingly, the dark current in the device originates from the thermally emitted electrons across the Schottky barrier. The fittings obtained

    更新日期:2020-09-02
  • Effect of radio frequency bias on plasma characteristics of inductively coupled argon discharge based on fluid simulations
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Xiao-Yan Sun, Yu-Ru Zhang, Sen Chai, You-Nian Wang, Yan-Yan Chu and Jian-Xin He

    A fluid model is employed to investigate the effect of radio frequency bias on the behavior of an argon inductively coupled plasma (ICP). In particular, the effects of ICP source power, single-frequency bias power, and dual-frequency bias power on the characteristics of ICP are simulated at a fixed pressure of 30 mTorr (1 Torr = 1.33322 × 10 2 Pa). When the bias frequency is fixed at 27.12 MHz, the

    更新日期:2020-09-02
  • Flux-to-voltage characteristic simulation of superconducting nanowire interference device
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Xing-Yu Zhang, Yong-Liang Wang, Chao-Lin Lv, Li-Xing You, Hao Li, Zhen Wang and Xiao-Ming Xie

    Inspired by recent discoveries of the quasi-Josephson effect in shunted nanowire devices, we propose a superconducting nanowire interference device in this study, which is a combination of parallel ultrathin superconducting nanowires and a shunt resistor. A simple model based on the switching effect of nanowires and fluxoid quantization effect is developed to describe the behavior of the device. The

    更新日期:2020-09-02
  • Dynamics and coherence resonance in a thermosensitive neuron driven by photocurrent
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Ying Xu, Minghua Liu, Zhigang Zhu and Jun Ma

    A feasible neuron model can be effective to estimate the mode transition in neural activities in a complex electromagnetic environment. When neurons are exposed to electromagnetic field, the continuous magnetization and polarization can generate nonlinear effect on the exchange and propagation of ions in the cell, and then the firing patterns can be regulated completely. The conductivity of ion channels

    更新日期:2020-09-02
  • Active Brownian particles simulated in molecular dynamics
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Liya Wang, Xinpeng Xu, Zhigang Li and Tiezheng Qian

    In the numerical studies of active particles, models consisting of a solid body and a fluid body have been well established and widely used. In this work, such an active Brownian particle (ABP) is realized in molecular dynamics (MD) simulations. Immersed in a fluid, each ABP consists of a head particle and a spherical phantom region of fluid where the flagellum of a microswimmer takes effect. Quantitative

    更新日期:2020-09-02
  • Oscillation of S5 helix under different temperatures in determination of the open probability of TRPV1 channel
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-31
    Tie Li, Jun-Wei Li, Chun-Li Pang, Hailong An, Yi-Zhao Geng and Jing-Qin Wang

    Transient receptor potential vanilloid subtype 1 (TRPV1) is a polymodel sensory receptor and can be activated by moderate temperature (≥ 43 °C). Though extensive researches on the heat-activation mechanism revealed some key elements that participate in the heat-sensation pathway, the detailed thermal-gating mechanism of TRPV1 is still unclear. We investigate the heat-activation process of TRPV1 channel

    更新日期:2020-09-02
  • Vanadium based X VO 3 ( X = Na, K, Rb) as promising thermoelectric materials: First-principle DFT calculations
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    N A Noor, Nosheen Mushahid, Aslam Khan, Nessrin A. Kattan, Asif Mahmood and Shahid M. Ramay

    We investigate structural, mechanical, thermodynamic, and thermoelectric properties of vanadium-based X VO 3 ( X = Na, K, Rb) materials using density functional theory (DFT) based calculations. The structural and thermodynamic stabilities are probed by the tolerance factor (0.98, 1.01, and 1.02) with the negative value of enthalpy of formation. Mechanical properties are analyzed in the form of Born

    更新日期:2020-08-31
  • Computation and analysis of light emission in two-bubble sonoluminescence
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    Jin-Fu Liang, Xue-You Wu, Yu An, Wei-Zhong Chen and Jun Wang

    We perform a computational simulation of light emissions from two sonoluminescent bubbles in water. Our simulation includes the radii of two bubbles, radiation acoustic pressures, and light emission spectra by numerically solving the pulsing equations of a two-bubble system and the equations of gas dynamics. The simulation results demonstrate that the motion of each bubble in the two-bubble system

    更新日期:2020-08-31
  • Suppression of auto-resonant stimulated Brillouin scattering in supersonic flowing plasmas by different forms of incident lasers
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    S S Ban, Q Wang, Z J Liu, C Y Zheng and X T He

    In supersonic flowing plasmas, the auto-resonant behavior of ion acoustic waves driven by stimulated Brillouin backscattering is self-consistently investigated. A nature of absolute instability appears in the evolution of the stimulated Brillouin backscattering. By adopting certain form of incident lights combined by two perpendicular linear polarization lasers or polarization rotation lasers, the

    更新日期:2020-08-31
  • Size effect of He clusters on the interactions with self-interstitial tungsten atoms at different temperatures
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    Jinlong Wang, Wenqiang Dang, Daping Liu and Zhichao Guo

    The behaviors of helium clusters and self-interstitial tungsten atoms at different temperatures are investigated with the molecular dynamics method. The self-interstitial tungsten atoms prefer to form crowdions which can tightly bind the helium cluster at low temperature. The crowdion can change its position around the helium cluster by rotating and slipping at medium temperatures, which leads to formation

    更新日期:2020-08-31
  • Dynamical analysis for hybrid virus infection system in switching environment
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    Dong-Xi Li and Ni Zhang

    We investigate the dynamical behavior of hybrid virus infection systems with nonlytic immune response in switching environment, which is modeled as a stochastic process of telegraph noise and represented as a multi-state Markov chains. Firstly, The existence of unique positive solution and boundedness of the new hybrid system is proved. Furthermore, the sufficient conditions for extinction and persistence

    更新日期:2020-08-31
  • Effects of postselected von Neumann measurement on the properties of single-mode radiation fields
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    Yusuf Turek

    Postselected von Neumann measurement characterized by postselection and weak value has been found to possess potential applications in quantum metrology and solved plenty of fundamental problems in quantum theory. As an application of this new measurement technique in quantum optics and quantum information processing, its effects on the features of single-mode radiation fields such as coherent state

    更新日期:2020-08-31
  • Epitaxial growth of antimony nanofilms on HOPG and thermal desorption to control the film thickness
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    Shuya Xing, Le Lei, Haoyu Dong, Jianfeng Guo, Feiyue Cao, Shangzhi Gu, Sabir Hussain, Fei Pang, Wei Ji, Rui Xu and Zhihai Cheng

    Group-V elemental nanofilms were predicted to exhibit interesting physical properties such as nontrivial topological properties due to their strong spin–orbit coupling, the quantum confinement, and surface effect. It was reported that the ultrathin Sb nanofilms can undergo a series of topological transitions as a function of the film thickness h : from a topological semimetal ( h > 7.8 nm) to a topological

    更新日期:2020-08-31
  • Dispersion of exciton-polariton based on ZnO/MgZnO quantum wells at room temperature
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    Huying Zheng, Zhiyang Chen, Hai Zhu, Ziying Tang, Yaqi Wang, Haiyuan Wei and Chongxin Shan

    We report observation of dispersion for coupled exciton-polariton in a plate microcavity combining with ZnO/MgZnO multi-quantum well (QW) at room temperature. Benefited from the large exciton binding energy and giant oscillator strength, the room-temperature Rabi splitting energy can be enhanced to be as large as 60 meV. The results of excitonic polariton dispersion can be well described using the

    更新日期:2020-08-31
  • Acoustic radiation force on thin elastic shells in liquid
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    Run-Yang Mo, Jing Hu, Shi Chen and Cheng-Hui Wang

    Based on the coupled acoustic scattering of two neighboring fluid-filled thin elastic shells suspending in an unbounded viscous liquid, an analytical method is developed to calculate the acoustic radiation force (ARF) of the shells. Two physical effects are taken into account: elastic radiation scattering and the multiple interactions of shells. Numerical results reveal that the magnitude of ARF can

    更新日期:2020-08-31
  • Spoof surface plasmon polaritons excited leaky-wave antenna with continuous scanning range from endfire to forward
    Chin. Phys. B (IF 1.223) Pub Date : 2020-08-27
    Tao Zhong and Hou Zhang

    A novel leaky-wave antenna (LWA) utilizing spoof surface plasmon polaritons (SSPPs) excitation is proposed with continuous scanning range from endfire to forward. The designed transmission line unit supports two SSPPS modes, of which the 2nd order mode is applied in the design. A novel strategy has been devised to excite the spatial radiation of the –1st order harmonics by arranging periodic counter

    更新日期:2020-08-31
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