当前位置：
X-MOL 学术
›
J. Mater. Chem. C
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Extremely large magnetoresistance in the antiferromagnetic semimetal GdSb
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-02-21 00:00:00 , DOI: 10.1039/c8tc00028j J. J. Song 1, 2, 3, 4, 5 , F. Tang 1, 2, 3, 4, 5 , W. Zhou 1, 2, 3, 4, 5 , Y. Fang 1, 2, 3, 4, 5 , H. L. Yu 1, 2, 3, 4, 5 , Z. D. Han 1, 2, 3, 4, 5 , B. Qian 1, 2, 3, 4, 5 , X. F. Jiang 1, 2, 3, 4, 5 , D. H. Wang 6, 7, 8, 9 , Y. W. Du 6, 7, 8, 9
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-02-21 00:00:00 , DOI: 10.1039/c8tc00028j J. J. Song 1, 2, 3, 4, 5 , F. Tang 1, 2, 3, 4, 5 , W. Zhou 1, 2, 3, 4, 5 , Y. Fang 1, 2, 3, 4, 5 , H. L. Yu 1, 2, 3, 4, 5 , Z. D. Han 1, 2, 3, 4, 5 , B. Qian 1, 2, 3, 4, 5 , X. F. Jiang 1, 2, 3, 4, 5 , D. H. Wang 6, 7, 8, 9 , Y. W. Du 6, 7, 8, 9
Affiliation
|
Semimetals with extremely large magnetoresistance have attracted significant interest because of their possible nontrivial electronic structures, unusual transport properties, and also deep connections to high-energy physics. In this paper, we synthesize the GdSb single crystal and systematically characterize its crystal structure, magnetism, and electric transport properties. It is found that this compound crystallizes in the NaCl-type structure with a space group Fm![[3 with combining macron]](https://www.rsc.org/images/entities/char_0033_0304.gif)
m and experiences an antiferromagnetic phase transition at 23.4 K. Electric transport measurements reveal that this compound is metallic, in which spin disorders induced a resistivity anomaly emerging around its magnetic transition temperature. Intriguingly, obvious resistivity plateaus are observed at low temperatures, when the compound is subjected to the external magnetic field, showing an extremely large magnetoresistance effect up to 12 100% at 2 K and 9 T. Through the Hall resistivity measurement and first-principles band structure calculations, GdSb is believed to be a multi-band and compensated semimetal, in which the total carrier concentrations of electrons and holes are almost comparable. The electron–hole compensation and ultrahigh mobility of GdSb can contribute to the large magnetoresistance in this compound.
中文翻译：
反铁磁半金属GdSb中的极大磁阻
具有极大的磁阻的半金属由于其可能的非平凡的电子结构，异常的传输特性以及与高能物理的深厚联系而引起了广泛的关注。在本文中，我们合成了GdSb单晶并系统地表征了其晶体结构，磁性和电传输性质。发现该化合物以具有空间群Fm m的NaCl型结构结晶。并在23.4 K处经历反铁磁相变。电传输测量表明该化合物是金属的，其中自旋失调引起在其磁转变温度附近出现的电阻率异常。有趣的是，当化合物受到外部磁场作用时，在低温下观察到明显的电阻率平稳期，显示出在2 K和9 T时高达12 100％的极大的磁阻效应。通过霍尔电阻率测量和第一原理带在结构计算中，GdSb被认为是一种多频带和补偿半金属，其中电子和空穴的总载流子浓度几乎是可比的。GdSb的电子-空穴补偿和超高迁移率可导致该化合物具有较大的磁阻。
更新日期：2018-02-21
m and experiences an antiferromagnetic phase transition at 23.4 K. Electric transport measurements reveal that this compound is metallic, in which spin disorders induced a resistivity anomaly emerging around its magnetic transition temperature. Intriguingly, obvious resistivity plateaus are observed at low temperatures, when the compound is subjected to the external magnetic field, showing an extremely large magnetoresistance effect up to 12 100% at 2 K and 9 T. Through the Hall resistivity measurement and first-principles band structure calculations, GdSb is believed to be a multi-band and compensated semimetal, in which the total carrier concentrations of electrons and holes are almost comparable. The electron–hole compensation and ultrahigh mobility of GdSb can contribute to the large magnetoresistance in this compound.
中文翻译：
反铁磁半金属GdSb中的极大磁阻
具有极大的磁阻的半金属由于其可能的非平凡的电子结构，异常的传输特性以及与高能物理的深厚联系而引起了广泛的关注。在本文中，我们合成了GdSb单晶并系统地表征了其晶体结构，磁性和电传输性质。发现该化合物以具有空间群Fm m的NaCl型结构结晶。
并在23.4 K处经历反铁磁相变。电传输测量表明该化合物是金属的，其中自旋失调引起在其磁转变温度附近出现的电阻率异常。有趣的是，当化合物受到外部磁场作用时，在低温下观察到明显的电阻率平稳期，显示出在2 K和9 T时高达12 100％的极大的磁阻效应。通过霍尔电阻率测量和第一原理带在结构计算中，GdSb被认为是一种多频带和补偿半金属，其中电子和空穴的总载流子浓度几乎是可比的。GdSb的电子-空穴补偿和超高迁移率可导致该化合物具有较大的磁阻。
京公网安备 11010802027423号