We study the confined states of a molecule formed by two laterally coupled quantum dots. The static electric field and incident plane wave laser field are considered with different polarization. The respective Shrödinger equation is obtained in the framework of the high-frequency limit of Floquet theory. It is shown that the electric field has a qualitative impact on the spatial symmetry of electronic

Two hierarchical structures were designed using Fe3O4 as a core and ZIF-8 or ZIF-67 as a support. Fe3O4@ZIF-8 and Fe3O4@ZIF-67 were prepared through a facial one-step solvothermal method at room temperature. Results confirmed the microporous and mesoporous morphology of Fe3O4@ZIF-8 and Fe3O4@ZIF-67 nanoparticles. The porous structure of ZIF combined with Fe3O4 causes the composite electrode to have

Spin Seebeck effect has been mostly explored in bulk magnetic materials, but the efficiency is not large enough for device application. Recently, we have found that the 2D ferromagnetic CrPbTe3 layer has rather a high Curie temperature of 110 K. Thus, we have investigated the spin dependent Seebeck effect using the Boltzmann transport approach. We have found the largest carrier mobility and relaxation

A like-CORC based on the Quasi-isotropic (Q-IS) conductor, so called Q-IS_CORC consisting of CORC and Q-IS making from 2G high temperature superconducting (HTS) tapes, is investigated in terms of AC losses by combining experimental with numerical methods. A new type of a like-CORC conductor is presented and is good bending performance as well as easy to manufacture in long lengths. Moreover, this paper

In this paper, two types of conceptual structures of 10 MW fully superconducting offshore wind turbine generators (FSWTG) with an efficient electrical design method are presented. Four types of generator models, Gen. A - D, are compared according to different armature winding structures, and it's found that Gen. A is the preferable one. Optimization of the main generator parameters reveals that 36

Realization of oxide/oxide semiconductor hetrostructures based high performance electronic/optoelectronic/magneto-optical devices warrants in-depth understanding of energy band alignment at their interface. Herein, we report energy band alignment in pulsed laser ablated Cr2O3/Ti0.02Cr1.98O3 bilayer film from the knowledge of core level energies and valence band maxima positions in the corresponding

Metacomposites with tunable negative permittivity find wide range of applications such as in novel electrical devices, flexible invisibility cloaks, stretchable sensors, etc. In the work reported here, the superior tunable negative permittivity of Polydimethylsiloxane (PDMS)-Graphite nanocomposites, over graphite and neat PDMS has been demonstrated. The ac conductivity and impedance of PDMS composites

Poisson’s ratios of two-dimensional (2D) all-inorganic perovskites Cs2PbX4 (X = Cl, Br, I) have been calculated by the first-principles calculations. The contribution of each geometric parameter (bond length L, bond angle Φ, rotation angle 𝜃1, and tilt angle 𝜃2) to Poisson’s ratio is obtained analytically. Through a comprehensive analysis of the geometric deformations of the perovskite under the

The directed transport of inertial Lévy flights resulting from the superimposed roughness in a corrugated potential is investigated in this paper. The influence of the roughness on the transport is studied by calculating the mean velocity (MV) and the mean first escape time (MFET), with respect to the Lévy index μ and the asymmetry parameter q which determines the asymmetry of the potential. The results

The Andreev conductance in Δ-shaped quantum dots (QDs) system coupled with Majorana bound states (MBSs) is studied and resulting conductance spectrum displays resonant and non-resonant processes. These fluctuated resonances render features like insulating band, bonding (antibonding) in the low-bias region due to non-trivial role of interdot coupling tc and dots-MBSs coupling λ. On comparing QD levels

Thermodynamic functions of the thermal expansion (αp), isothermal compressibility (κT) and the difference in the heat capacity (Cp−Cv) are calculated as a function of temperature (P=18 GPa) close to the transitions of 𝜀–δloc and δloc–δ in the solid nitrogen. This calculation is performed by using the observed Raman frequency shifts of vibrons (υ1,υ2 and υ22). Also, by using the observed V–P data,

Using first-principles calculations, we investigate the structural, electronic, thermal and optical properties of hexagonal ScAl3C3-type structure LaCd3P3 under high pressure. By calculating elastic constant, the mechanical stability of LaCd3P3 at high pressures was discussed. Then, by calculating the band gap and density of states, the pressure effect on electronic properties of LaCd3P3 was discussed

Whereas microstructure evolution in adiabatic shear bands have been thoroughly studied, reports on the stability of hardening precipitates during shear localisation are scarce. We report an atomic scale investigation of solute distribution in adiabatic shear bands in a precipitation strengthened Ni–Fe-based superalloy, showing that the hardening particles are completely dissolved. Temperature estimations

The influence of the volume fraction of nano-sized TiCN reinforcement additive on the mechanical properties and the microstructure of Al-based composite was studied. It was found that the addition of nano-sized TiCN particulates into the Al-matrix leads to a substantial improvement of the mechanical properties of the composite, TiCN-Al. However, the obtained results showed that the strengthening effect

LiCoO2 was synthesized by the sol-gel method. Using the proposed synthesis method, a cathode was obtained at the final annealing temperature of 700 °C with a grain size of 40–80 nm. The chemical reaction stability of composite solid electrolytes based on Li7La3Zr2O12 in contact with LiCoO2 was studied using differential scanning calorimetry, Raman spectroscopy, and X-ray diffraction. The composite

We report the structural, magnetic, magnetocaloric properties, and the critical behavior of the NiCeFeO4 spinel ferrite synthesized via the sol–gel method. The XRD analysis has revealed that NiCeFeO4 belongs to the Fd-3m space group of the cubic spinel structure. Furthermore, magnetic properties demonstrate that the prepared sample undergoes a second-order ferromagnetic-paramagnetic (FM-PM) phase transitions

Kitaev chain (KC) is a prototypical model for the study of Majorana fermions (MFs). In the topological phase, a KC hosts two MFs at its ends. Being separated in space, these two MFs are nonlocal. The nonlocal transport in a KC biased between two normal metal leads is mediated by electron tunneling (ET) and crossed Andreev reflection (CAR). ET contributes positively while CAR contributes negatively

In this comprehensive study, interaction of human serum albumin (HSA) with poly(acrylic acid) (PAA) was explored using Small Angle X-ray Scattering (SAXS) combined to chromatography. Results revealed the formation of a complex between HSA macromolecules and PAA chains but solely at some specific conditions of ionic strength and pH of the medium. In fact, this binding has found to take place only at

We have observed fluid-fluid coexistence in dimyristoylphosphatidylcholine (DMPC) membranes containing 1-decanol, using different experimental techniques and membrane morphologies. This phase behavior is reversible and occurs over a temperature range just above the chain melting transition temperature of the membrane. Although earlier experimental studies and computer simulations have shown the ability

We study the electronic structure of GdNi and HoNi, which are magnetic materials with a Curie temperature Tc = 69 K and Tc = 36 K, respectively. These materials are useful for magnetic refrigerator applications at low temperature as they exhibit a large magnetocaloric effect near Tc. We have used Hard X-ray photoemission spectroscopy (HAXPES) to investigate the core level and valence band electronic

We report on the low-frequency optical excitations in the multiferroic ground state of polycrystalline in the frequency range 0.3-3 THz and their changes upon applying external magnetic fields up to 7 T. In the ground state below the orbital-ordering temperature TOO=9~K we observe the appearance of several new modes. By applying the external magnetic field parallel and perpendicular to the propagation

We report a muon spin rotation (μ+SR) study of the magnetic properties of the double perovskite compound LaSrNiReO6. Using the unique length and time scales of the μ+SR technique, we successfully clarify the magnetic ground state of LaSrNiReO6, which was previously deemed as a spin glass state. Instead, our μ+SR results point towards a long-range dynamically ordered ground state below $T_{\rm C}= 23$~K

Multiferroics with intrinsic ferromagnetism and ferroelectricity are highly desired but rather rare, while most ferroelectric magnets are antiferromagnetic. A recent theoretical work [Phys. Rev. B 99, 195434 (2019)] predicted that oxyhalides VOX2 (X: halogen) monolayers are two-dimensional multiferroics by violating the empirical d0 rule. Most interestingly, the member VOI2 are predicted to exhibit

is a prototypical antiferromagnet with a characteristic resonance frequency in the THz range. From atomistic spin dynamics simulations that take into account the crystallographic structure of NiO, and in particular a magnetic anisotropy respecting its symmetry, we describe antiferromagnetic switching at THz frequency by a spin transfer torque mechanism. Sub-picosecond S-state switching between the

2D Materials with coexistence of ferromagnetism (FM) and ferroelectricity (FE) are rare. By using first-principles modelling, here we report that doping of magnetic transition metal (TM) atoms in FE monolayer In2Se3 could introduce giant local FM magnetic moments (4B per Mn atom). The exchange splitting energy, and the C3ν crystal field together with the hybridization of the Mn-d and Se-p orbitals

Visible light communication (VLC) based on a light-emitting diode (LED) is considered to be a potential candidate for the next-generation communication. In this paper, a novel Zadoff–Chu matrix transform (ZCT) precoding is proposed to improve the performance of the traditional space-time block coding- (STBC-) based multiple-input multiple-output and orthogonal frequency division multiplexing (MIMO-OFDM)

We reveal how the vector field links are untied under the influence of anti-parity-time-symmetric couplings in a dissipative sublattice-symmetric topological photonic crystal lattice. The topology of the quasi-one-dimensional two-band system is encoded in the geometric topology of the vector fields associated with the Bloch Hamiltonian. The linked vector fields reflect the topology of the nontrivial

For non-collinear antiferromagnetic metals, magnon spectra display non-trivial multi-band structure in which both direction and magnitude of the angular momenta of magnons are momentum-dependent. We study the roles of these magnons on the spin transport properties by taking into account the momentum and angular momentum transfer between conduction electrons and magnons. We have calculated spin conductivity

Boundary obstructed topological insulators are an unusual class of higher-order topological insulators with topological characteristics determined by the so-called Wannier bands. Boundary obstructed phases can harbor hinge/corner modes, but these modes can often be destabilized by a phase transition on the boundary instead of the bulk. While there has been much work on the stability of topological

Entanglement can exist not only in the microscopic system (e.g., atom, photon, and ion trap) but also in macroscopic systems. According to recent research, entanglement can be achieved and controlled in superconducting devices. The quantum dynamics and entanglement mechanism of the coupled superconducting phase qubit and a two-level system (TLS) were demonstrated when the bipartite system was under

The magnetic properties of iron-based superconductors AFe2As2 (A=K, Cs, and Rb), which are characterized by the V-shaped dependence of the critical temperature ($T_{\rm c}$) on pressure (P) were studied by means of the muon spin rotation/relaxation technique. In all three systems studied the magnetism was found to appear for pressures slightly below the critical one ($P_{\rm c}$), {} at pressure where

The break-down of the Born-Oppenheimer approximation is an important topic in chemical dynamics on metal surfaces. In this context, the most frequently used {"}work-horse{’’} is electronic friction theory, commonly relying on friction coefficients obtained from density functional theory (DFT) calculations from the early 80s based on the atom-in-jellium model. However, results are only available for

We introduce an adiabatic transfer protocol for spin states in large quantum dot arrays that is based on time-dependent modulation of the Heisenberg exchange interaction in the presence of a magnetic field gradient. We refer to this protocol as spin-CTAP (coherent transport by adiabatic passage) in analogy to a related protocol developed for charge state transfer in quantum dot arrays. The insensitivity

Topological superconductors, characterized by topologically nontrivial states residing in a superconducting gap, are a recently discovered class of materials having Majorana Fermions. The interplay of superconductivity and topological states give rise to opportunities for achieving such topological superconductors in condensed matter systems. Up to now, several single-material topological superconductors

Scanning tunneling microscopy and spectroscopy are utilized to study the atomic-scale structure and electronic properties of infinite-layer Sr0.94La0.06CuO2+y films prepared on SrRuO3-buffered SrTiO3(001) substrate by ozone-assisted molecular beam epitaxy. Incommensurate structural supermodulation with a period of 24.5 ${\AA}$ is identified on the CuO2-terminated surface, leading to characteristic

We study finite-temperature properties of the Kondo effect in a carbon nanotube (CNT) quantum dot using the Wilson numerical renormalization group (NRG). In the absence of magnetic fields, four degenerate energy levels of the CNT consisting of spin and orbital degrees of freedom give rise to the SU(4) Kondo effect. We revisit the universal scaling behaviour of the SU(4) conductance for quarter- and

The angstrom-scale coherence length describing the superfluid wavefunction of 4He at low temperatures has prevented its preparation in a truly one-dimensional geometry. Mesoporous ordered silica-based structures, such as the molecular sieve MCM-41, offer a promising avenue towards physical confinement, but the minimal pore diameters that can be chemically synthesized have proven to be too large to

One-dimensional (1D) quantum wires, which are functionalized by magnetic ad-atoms, can host ballistic helical transport. Helicity protects transport from an undesirable influence of material imperfections and makes the magnetically doped wire very promising elements for nanoelectronics and spintronics. However, fabricating purely 1D conductors is experimentally very challenging and not always feasible

We extend the description of the non-equilibrium Gross-Pitaevskii equation for microcavity polaritons by including not only the kinetics of the non-resonantly pumped exciton reservoir but also that of the collective excitations - called bogolons - above the condensate. Quasi-equilibrium Hartree-Fock-Bogoliubov-Popov self-energies are used to describe the condensate and the bogolons. With non-equilibrium

Lattice and magnetic degrees of freedom are strongly coupled in magnetic materials. We propose a consistent first-principles framework to explore the joint configurational space. For this, we define atomic spin moments from the projector-augmented wave formalism of density-functional theory and control them via Lagrangian constraints. We demonstrate our approach for vacancy formation and migration

The transport spectral function of electron-phonon(e-ph) interaction in the double delta function approximation(DDFA) is extensively employed to calculate the intrinsic resistivity(arising from e-ph scattering) of metallic materials in recently works of first principles calculations. In contrast, a more fundamental transport spectral function with Fermi smearing effect due to finite temperature(T)

An ab-initio scheme is developed and used to investigate finite-temperature properties of a prototype of the complex rare earth - iron garnets, namely Gd3Fe5O12 (that is, possessing Gadolinium as its rare-earth ion), under applied magnetic fields. It is found that such a system undergoes a field-induced transition at a critical temperature, Trev, at which all magnetic ions revert the direction of their

We investigate localization properties of driven models which exhibit a sub-extensive number of extended states in the static setting. We consider instances where the extended modes are or are not protected by topological considerations. To this end, we contrast the strongly driven disordered lowest Landau level, which we refer to as the random Landau model (RLM), with the random dimer model (RDM);

Semiclassical neutral atom theory is an important constraint of the state-of-art development of exchange-correlation functionals for solid-state physics. Based on this theory, we construct a screened range-separated hybrid functional for strongly bound bulk solids, which also satisfies the accurate linear response of the Local Density Approximation. The constructed functional shows remarkable performance

The optical control of magnetism offers an attractive possibility to manipulate small magnetic domains for prospective memory devices on ultrashort timescales. Here, we report on the local deterministic transformation of the magnetic domain pattern from stripes to bubbles in out-ofplane magnetized Co/Pt multilayers controlled only by the helicity of ultrashort laser pulses. Relying on the experimentally

We theoretically study Josephson junctions with a transition metal dichalcogenide zigzag ribbon as a weak link. We demonstrate that the spatial profile of the supercurrent carried by the edge modes determines the critical current dependence on the perpendicular magnetic field. We explore this finding and analyze the impact of Zeeman interaction and the orbital effects of the magnetic field on the Andreev