$Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}$
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Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}

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 untilt...

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Autores principales:	Seng Huat Lee, David Graf, Lujin Min, Yanglin Zhu, Hemian Yi, Samuel Ciocys, Yuanxi Wang, Eun Sang Choi, Rabindra Basnet, Arash Fereidouni, Aaron Wegner, Yi-Fan Zhao, Katrina Verlinde, Jingyang He, Ronald Redwing, V. Gopalan, Hugh O. H. Churchill, Alessandra Lanzara, Nitin Samarth, Cui-Zu Chang, Jin Hu, Z. Q. Mao
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/5acc8dfb67f3414d905e8cceb512b771
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spelling	oai:doaj.org-article:5acc8dfb67f3414d905e8cceb512b7712021-12-02T17:58:51ZEvidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}10.1103/PhysRevX.11.0310322160-3308https://doaj.org/article/5acc8dfb67f3414d905e8cceb512b7712021-08-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.031032http://doi.org/10.1103/PhysRevX.11.031032https://doaj.org/toc/2160-3308The 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(Bi_{1−x}Sb_{x})_{2}Te_{4} 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.Seng Huat LeeDavid GrafLujin MinYanglin ZhuHemian YiSamuel CiocysYuanxi WangEun Sang ChoiRabindra BasnetArash FereidouniAaron WegnerYi-Fan ZhaoKatrina VerlindeJingyang HeRonald RedwingV. GopalanHugh O. H. ChurchillAlessandra LanzaraNitin SamarthCui-Zu ChangJin HuZ. Q. MaoAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 3, p 031032 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Seng Huat Lee David Graf Lujin Min Yanglin Zhu Hemian Yi Samuel Ciocys Yuanxi Wang Eun Sang Choi Rabindra Basnet Arash Fereidouni Aaron Wegner Yi-Fan Zhao Katrina Verlinde Jingyang He Ronald Redwing V. Gopalan Hugh O. H. Churchill Alessandra Lanzara Nitin Samarth Cui-Zu Chang Jin Hu Z. Q. Mao Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}
description	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(Bi_{1−x}Sb_{x})_{2}Te_{4} 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.
format	article
author	Seng Huat Lee David Graf Lujin Min Yanglin Zhu Hemian Yi Samuel Ciocys Yuanxi Wang Eun Sang Choi Rabindra Basnet Arash Fereidouni Aaron Wegner Yi-Fan Zhao Katrina Verlinde Jingyang He Ronald Redwing V. Gopalan Hugh O. H. Churchill Alessandra Lanzara Nitin Samarth Cui-Zu Chang Jin Hu Z. Q. Mao
author_facet	Seng Huat Lee David Graf Lujin Min Yanglin Zhu Hemian Yi Samuel Ciocys Yuanxi Wang Eun Sang Choi Rabindra Basnet Arash Fereidouni Aaron Wegner Yi-Fan Zhao Katrina Verlinde Jingyang He Ronald Redwing V. Gopalan Hugh O. H. Churchill Alessandra Lanzara Nitin Samarth Cui-Zu Chang Jin Hu Z. Q. Mao
author_sort	Seng Huat Lee
title	Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}
title_short	Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}
title_full	Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}
title_fullStr	Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}
title_full_unstemmed	Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}
title_sort	evidence for a magnetic-field-induced ideal type-ii weyl state in antiferromagnetic topological insulator mn(bi_{1−x}sb_{x})_{2}te_{4}
publisher	American Physical Society
publishDate	2021
url	https://doaj.org/article/5acc8dfb67f3414d905e8cceb512b771
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Evidence for a Magnetic-Field-Induced Ideal Type-II Weyl State in Antiferromagnetic Topological Insulator Mn(Bi_{1−x}Sb_{x})_{2}Te_{4}

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