@article{68ab90531b294c84bc2d863fcfcce748,
title = "Topological Transitions Induced by Antiferromagnetism in a Thin-Film Topological Insulator",
abstract = "Magnetism in topological insulators (TIs) opens a topologically nontrivial exchange band gap, providing an exciting platform for manipulating the topological order through an external magnetic field. Here, we show that the surface of an antiferromagnetic thin film can magnetize the top and the bottom TI surface states through interfacial couplings. During the magnetization reversal, intermediate spin configurations are ascribed from unsynchronized magnetic switchings. This unsynchronized switching develops antisymmetric magnetoresistance spikes during magnetization reversals, which might originate from a series of topological transitions. With the high N{\'e}el ordering temperature provided by the antiferromagnetic layers, the signature of the induced topological transition persists up to ∼90 K.",
author = "He, {Qing Lin} and Gen Yin and Luyan Yu and Grutter, {Alexander J.} and Lei Pan and Chen, {Chui Zhen} and Xiaoyu Che and Guoqiang Yu and Bin Zhang and Qiming Shao and Stern, {Alexander L.} and Brian Casas and Jing Xia and Xiaodong Han and Kirby, {Brian J.} and Lake, {Roger K.} and Law, {K. T.} and Wang, {Kang L.}",
note = "Funding Information: This work was supported as part of the SHINES Center, an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences under Award No. S000686. Q. L. He acknowledges the supports from the National Natural Science Foundation of China (Grant No. 11874070), the National Key R&D Program of China (Grant No. 2018YFA0305601), and National Thousand-Young-Talents Program in China. We are also grateful for the support from the National Science Foundation (DMR-1411085), and the ARO program under Contract No. W911NF-15-1-10561. K. T. Law acknowledges the support of Hong Kong Research Grants Council (HKRGC) through C6026-16W, the Croucher Foundation, and the Tai-chin Lo Foundation. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation Grant No. OCI-1053575. Specifically, it used the Bridges system, which is supported by NSF Grant No. ACI-1445606, at the Pittsburgh Supercomputing Center (PSC). Funding Information: This work was supported as part of the SHINES Center, an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences under Award No. S000686. Q.-L. He acknowledges the supports from the National Natural Science Foundation of China (Grant No. 11874070), the National Key R&D Program of China (Grant No. 2018YFA0305601), and National Thousand-Young-Talents Program in China. We are also grateful for the support from the National Science Foundation (DMR-1411085), and the ARO program under Contract No. W911NF-15-1-10561. K.-T. Law acknowledges the support of Hong Kong Research Grants Council (HKRGC) through C6026-16W, the Croucher Foundation, and the Tai-chin Lo Foundation. This work used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation Grant No. OCI-1053575. Specifically, it used the Bridges system, which is supported by NSF Grant No. ACI-1445606, at the Pittsburgh Supercomputing Center (PSC). Publisher Copyright: {\textcopyright} 2018 American Physical Society.",
year = "2018",
month = aug,
day = "29",
doi = "10.1103/PhysRevLett.121.096802",
language = "English",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",
}