Observation of Quantum Anomalous Hall Effect and Exchange Interaction in Topological Insulator/Antiferromagnet Heterostructure
Pan, Lei1; Grutter, Alexander2; Zhang, Peng1; Che, Xiaoyu1; Nozaki, Tomohiro3; Stern, Alex4; Street, Mike5; Zhang, Bing6; Casas, Brian4; He, Qing Lin1,7; Choi, Eun Sang8; Disseler, Steven M.2; Gilbert, Dustin A.9; Yin, Gen1; Shao, Qiming1,10; Deng, Peng1; Wu, Yingying1; Liu, Xiaoyang11; Kou, Xufeng11; Masashi, Sahashi3; Han, Xiaodong6; Binek, Christian5; Chambers, Scott12; Xia, Jing4; Wang, Kang L.1,13,14
AbstractIntegration of a quantum anomalous Hall insulator with a magnetically ordered material provides an additional degree of freedom through which the resulting exotic quantum states can be controlled. Here, an experimental observation is reported of the quantum anomalous Hall effect in a magnetically-doped topological insulator grown on the antiferromagnetic insulator Cr2O3. The exchange coupling between the two materials is investigated using field-cooling-dependent magnetometry and polarized neutron reflectometry. Both techniques reveal strong interfacial interaction between the antiferromagnetic order of the Cr(2)O(3)and the magnetic topological insulator, manifested as an exchange bias when the sample is field-cooled under an out-of-plane magnetic field, and an exchange spring-like magnetic depth profile when the system is magnetized within the film plane. These results identify antiferromagnetic insulators as suitable candidates for the manipulation of magnetic and topological order in topological insulator films.
Keywordantiferromagnet quantum anomalous Hall effect topological insulators
Indexed BySCI
Funding ProjectSpins and Heat in Nanoscale Electronic Systems (SHINES), an Energy Frontier Research Center - US Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES)[DE-SC0012670] ; Army Research Office Multidisciplinary University Research Initiative (MURI) program[W911NF-16-1-0472][W911NF-15-1-10561] ; U.S. Department of Energy, Office of Science, Division of Materials Sciences and Engineering[10122] ; National Science Foundation[DMR- 1157490][DMR- 1644779][ACI-1053575] ; NSF, at the Pittsburgh Supercomputing Center (PSC)[ACI-1445606] ; DOE Office of Science User Facility[DE-AC02-05CH11231] ; National Key R&D Program of China[2018YFA0305601][2017YFB0405704] ; Shanghai Sailing program[17YF1429200] ; NSF[DMR-1807817] ; National Natural Science Foundation of China[11874070] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB28000000]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000550414900001
Original Document TypeArticle ; Early Access
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWang, Kang L.
Affiliation1.Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
2.NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA
3.Tohoku Univ, Dept Elect Engn, Sendai, Miyagi 9808579, Japan
4.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
5.Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA
6.Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
7.Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
8.Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
9.Univ Tennessee, Dept Mat Sci, Knoxville, TN 37996 USA
10.Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
11.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 200031, Peoples R China
12.Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99352 USA
13.Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
14.Univ Calif Los Angeles, Dept Phys, Los Angeles, CA 90095 USA
Recommended Citation
GB/T 7714
Pan, Lei,Grutter, Alexander,Zhang, Peng,et al. Observation of Quantum Anomalous Hall Effect and Exchange Interaction in Topological Insulator/Antiferromagnet Heterostructure[J]. ADVANCED MATERIALS,2020.
APA Pan, Lei.,Grutter, Alexander.,Zhang, Peng.,Che, Xiaoyu.,Nozaki, Tomohiro.,...&Wang, Kang L..(2020).Observation of Quantum Anomalous Hall Effect and Exchange Interaction in Topological Insulator/Antiferromagnet Heterostructure.ADVANCED MATERIALS.
MLA Pan, Lei,et al."Observation of Quantum Anomalous Hall Effect and Exchange Interaction in Topological Insulator/Antiferromagnet Heterostructure".ADVANCED MATERIALS (2020).
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