Magnetic and transport properties in the magnetic topological insulators MnBi2Te4(Bi2Te3)n (n=1, 2)

被引：96

作者：

Shi, M. Z. ^{[1
,2
,3
]}

Lei, B. ^{[1
,2
,3
]}

Zhu, C. S. ^{[1
,2
,3
]}

Ma, D. H. ^{[1
,2
,3
]}

Cui, J. H. ^{[1
,2
,3
]}

Sun, Z. L. ^{[1
,2
,3
]}

Ying, J. J. ^{[1
,2
,3
,4
]}

Chen, X. H. ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Sci & Technol China, CAS, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, CAS, Dept Phys, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, CAS, Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Anhui, Peoples R China

[4] CAS Ctr Excellence Quantum Informat & Quantum Phy, Hefei 230026, Anhui, Peoples R China

[5] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 15期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

MANGANESE BISMUTH TELLURIDES; HALL; MAGNETORESISTANCE; REALIZATION;

D O I：

10.1103/PhysRevB.100.155144

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The observation of quantized anomalous Hall conductance in the forced ferromagnetic state of MnBi2Te4 thin flakes has attracted much attention. However, a strong magnetic field is needed to fully polarize the magnetic moments due to the large antiferromagnetic interlayer exchange coupling. Here, we reported the magnetic and electrical transport properties of the magnetic van der Waals MnBi2 Te-4(Bi2Te3), (n = 1, 2) single crystals, in which the interlayer antiferromagnetic exchange coupling is greatly suppressed with the increase of the separation layers Bi2Te3. MnBi4Te7 and MnBi6Te10 show weak antiferromagnetic transition at 12.3 and 10.5 K, respectively. The ferromagnetic hysteresis was observed at low temperature for both of the crystals, which is quite crucial for realizing the quantum anomalous Hall effect without external magnetic field. Our work indicates that MnBi2Te4 (Bi2Te3)(n) (n = 1, 2) provides an ideal platform to investigate the rich topological phases with their two-dimensional limits.

引用

页数：6

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