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Title: Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator MnB i 2 T e 4

Abstract

MnB i 2 T e 4 has recently been established as an intrinsic antiferromagnetic (AFM) topological insulator—an ideal platform to create quantum anomalous Hall insulator and axion insulator states. We performed comprehensive studies on the structure, nontrivial surface state, and magnetotransport properties of this material. Our results reveal an intrinsic anomalous Hall effect arising from a noncollinear spin structure for the magnetic field parallel to the c axis. We observed negative magnetoresistance under arbitrary field orientation below and above the Néel temperature (T N) , providing clear evidence for strong spin fluctuation-driven spin scattering in both the AFM and paramagnetic states. Furthermore, we found that the nontrivial surface state opens a large gap (~85 meV) even far above TN. Our findings demonstrate that the bulk band structure of MnB i 2 T e 4 is strongly coupled with the magnetic property and that a net Berry curvature in momentum space can be created in the canted AFM state. In addition, our results imply that the gap opening in the surface states is intrinsic, likely caused by the strong spin fluctuations in this material.

Authors:
ORCiD logo [1];  [2];  [1];  [3];  [3];  [3];  [3]; ORCiD logo [4];  [5];  [5];  [5];  [5];  [6];  [6];  [7];  [3];  [1];  [1];  [1]
  1. Pennsylvania State Univ., University Park, PA (United States). Materials Research Inst.
  2. Pennsylvania State Univ., University Park, PA (United States); Tulane Univ., New Orleans, LA (United States)
  3. Pennsylvania State Univ., University Park, PA (United States)
  4. Univ. of Arkansas, Fayetteville, AR (United States)
  5. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
  6. Michigan State Univ., East Lansing, MI (United States)
  7. National High Magnetic Field Lab., Tallahassee, FL (United States)
Publication Date:
Research Org.:
Univ. of Arkansas, Fayetteville, AR (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1558168
Alternate Identifier(s):
OSTI ID: 1593908
Grant/Contract Number:  
SC0019467; SC0012432; SC0019064; DMR-1157490; DMR1707502; DMR-1608752
Resource Type:
Published Article
Journal Name:
Physical Review Research (Online)
Additional Journal Information:
Journal Name: Physical Review Research (Online); Journal Volume: 1; Journal Issue: 1; Journal ID: ISSN 2643-1564
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Lee, Seng Huat, Zhu, Yanglin, Wang, Yu, Miao, Leixin, Pillsbury, Timothy, Yi, Hemian, Kempinger, Susan, Hu, Jin, Heikes, Colin A., Quarterman, P., Ratcliff, William, Borchers, Julie A., Zhang, Heda, Ke, Xianglin, Graf, David, Alem, Nasim, Chang, Cui-Zu, Samarth, Nitin, and Mao, Zhiqiang. Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator MnBi2Te4. United States: N. p., 2019. Web. doi:10.1103/PhysRevResearch.1.012011.
Lee, Seng Huat, Zhu, Yanglin, Wang, Yu, Miao, Leixin, Pillsbury, Timothy, Yi, Hemian, Kempinger, Susan, Hu, Jin, Heikes, Colin A., Quarterman, P., Ratcliff, William, Borchers, Julie A., Zhang, Heda, Ke, Xianglin, Graf, David, Alem, Nasim, Chang, Cui-Zu, Samarth, Nitin, & Mao, Zhiqiang. Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator MnBi2Te4. United States. doi:10.1103/PhysRevResearch.1.012011.
Lee, Seng Huat, Zhu, Yanglin, Wang, Yu, Miao, Leixin, Pillsbury, Timothy, Yi, Hemian, Kempinger, Susan, Hu, Jin, Heikes, Colin A., Quarterman, P., Ratcliff, William, Borchers, Julie A., Zhang, Heda, Ke, Xianglin, Graf, David, Alem, Nasim, Chang, Cui-Zu, Samarth, Nitin, and Mao, Zhiqiang. Mon . "Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator MnBi2Te4". United States. doi:10.1103/PhysRevResearch.1.012011.
@article{osti_1558168,
title = {Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator MnBi2Te4},
author = {Lee, Seng Huat and Zhu, Yanglin and Wang, Yu and Miao, Leixin and Pillsbury, Timothy and Yi, Hemian and Kempinger, Susan and Hu, Jin and Heikes, Colin A. and Quarterman, P. and Ratcliff, William and Borchers, Julie A. and Zhang, Heda and Ke, Xianglin and Graf, David and Alem, Nasim and Chang, Cui-Zu and Samarth, Nitin and Mao, Zhiqiang},
abstractNote = {MnBi2Te4 has recently been established as an intrinsic antiferromagnetic (AFM) topological insulator—an ideal platform to create quantum anomalous Hall insulator and axion insulator states. We performed comprehensive studies on the structure, nontrivial surface state, and magnetotransport properties of this material. Our results reveal an intrinsic anomalous Hall effect arising from a noncollinear spin structure for the magnetic field parallel to the c axis. We observed negative magnetoresistance under arbitrary field orientation below and above the Néel temperature (TN) , providing clear evidence for strong spin fluctuation-driven spin scattering in both the AFM and paramagnetic states. Furthermore, we found that the nontrivial surface state opens a large gap (~85 meV) even far above TN. Our findings demonstrate that the bulk band structure of MnBi2Te4 is strongly coupled with the magnetic property and that a net Berry curvature in momentum space can be created in the canted AFM state. In addition, our results imply that the gap opening in the surface states is intrinsic, likely caused by the strong spin fluctuations in this material.},
doi = {10.1103/PhysRevResearch.1.012011},
journal = {Physical Review Research (Online)},
number = 1,
volume = 1,
place = {United States},
year = {2019},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevResearch.1.012011

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