@article{69a758b53f344633b0817dc38b18cbe1,
title = "Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn (Bi1-xSbx)2Te4",
abstract = "The discovery of Weyl semimetals (WSMs) has fueled tremendous interest in condensed matter physics. The realization of WSMs requires the breaking of either inversion symmetry (IS) or time-reversal symmetry (TRS). WSMs can be categorized into type-I and type-II WSMs, which are characterized by untilted and strongly tilted Weyl cones, respectively. Type-I WSMs with breaking of either IS or TRS and type-II WSMs with solely broken IS have been realized experimentally, but a TRS-breaking type-II WSM still remains elusive. In this article, we report transport evidence for a TRS-breaking type-II WSM observed in the intrinsic antiferromagnetic topological insulator Mn(Bi1-xSbx)2Te4 under magnetic fields. This state is manifested by the electronic structure transition caused by the spin-flop transition. The transition results in an intrinsic anomalous Hall effect and negative c-axis longitudinal magnetoresistance attributable to the chiral anomaly in the ferromagnetic phases of lightly hole-doped samples. Our results establish a promising platform for exploring the underlying physics of the long-sought, ideal TRS-breaking type-II WSM.",
author = "Lee, {Seng Huat} and David Graf and Lujin Min and Yanglin Zhu and Hemian Yi and Samuel Ciocys and Yuanxi Wang and Choi, {Eun Sang} and Rabindra Basnet and Arash Fereidouni and Aaron Wegner and Zhao, {Yi Fan} and Katrina Verlinde and Jingyang He and Ronald Redwing and V. Gopalan and Churchill, {Hugh O.H.} and Alessandra Lanzara and Nitin Samarth and Chang, {Cui Zu} and Jin Hu and Mao, {Z. Q.}",
note = "Funding Information: We thank C. X. Liu for helpful discussions. The study is based upon research conducted at The Pennsylvania State University Two-Dimensional Crystal Consortium–Materials Innovation Platform (2DCC-MIP), which is supported by National Science Foundation (NSF) Cooperative Agreement No. DMR-1539916. Z. Q. M. acknowledges the support from the U.S. National Science Foundation under Grant No. DM-1917579. J. H. acknowledges the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences program under Grant No. DE-SC0019467 for the support of magnetization, quantum oscillation, and 31 T high field transport measurements. The work at the National High Magnetic Field Laboratory is supported by the NSF Cooperative Agreement No. DMR 1644779 and the State of Florida. L. M., J. H., and V. G.{\textquoteright}s work is supported by the Penn State Center for Nanoscale Science, an NSF MRSEC under Grant No. DMR-2011839. C. Z. C., H. Y., and Y. F. Z. acknowledge the support from the DOE Grant (No. DE-SC0019064) and the NSF-CAREER grant (No. DMR-1847811) for ARPES measurements at Penn State. The ARPES experiment at Berkeley was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05-CH11231 within the Quantum Material Program (KC2202). This experiment was performed by S. C. advised by A. L. and utilized the Advanced Light Source, a DOE Office of Science User Facility under Contract No. DE-AC02-05CH11231. Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",
year = "2021",
month = sep,
doi = "10.1103/PhysRevX.11.031032",
language = "English (US)",
volume = "11",
journal = "Physical Review X",
issn = "2160-3308",
publisher = "American Physical Society",
number = "3",
}