Electronic structures and photoemission spectroscopy

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Electronic structure of correlated topological insulator candidate YbB6 studied by photoemission and quantum oscillation

Chinese Physics B IOP Publishing 29:1 (2020) 017304

Authors:

T Zhang, G Li, SC Sun, N Qin, L Kang, SH Yao, HM Weng, SK Mo, L Li, ZK Liu, LX Yang, YL Chen
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Magnetic exchange induced Weyl state in a semimetal EuCd2Sb2

APL Materials AIP Publishing 8:1 (2020) 011109

Authors:

Hao Su, Benchao Gong, Wujun Shi, Haifeng Yang, Hongyuan Wang, Wei Xia, Zhenhai Yu, Peng-Jie Guo, Jinhua Wang, Linchao Ding, Liangcai Xu, Xiaokang Li, Xia Wang, Zhiqiang Zou, Na Yu, Zengwei Zhu, Yulin Chen, Zhongkai Liu, Kai Liu, Gang Li, Yanfeng Guo
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Topological Surface Dirac Fermion in BiTeCl-Based Heterostructures

SPIN World Scientific Publishing 09:04 (2019) 1940015

Authors:

T Zhang, YJ Chen, SC Sun, L Kang, LX Yang, ZK Liu, HJ Zhang, YL Chen
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Topological Electronic Structure and Its Temperature Evolution in Antiferromagnetic Topological Insulator MnBi2Te4

Physical Review X American Physical Society (APS) 9:4 (2019) 041040

Authors:

YJ Chen, LX Xu, JH Li, YW Li, HY Wang, CF Zhang, H Li, Y Wu, AJ Liang, C Chen, SW Jung, C Cacho, YH Mao, S Liu, MX Wang, YF Guo, Y Xu, ZK Liu, LX Yang, YL Chen
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Magnetic Weyl semimetal phase in a Kagomé crystal

Science American Association for the Advancement of Science 365:6459 (2019) 1282-1285

Authors:

DF Liu, AJ Liang, EK Liu, QN Xu, Yiwei Li, C Chen, D Pei, WJ Shi, SK Mo, P Dudin, T Kim, C Cacho, G Li, Y Sun, LX Yang, ZK Liu, SSP Parkin, C Felser, Yulin Chen

Abstract:

Weyl semimetals are crystalline solids that host emergent relativistic Weyl fermions and have characteristic surface Fermi-arcs in their electronic structure. Weyl semimetals with broken time reversal symmetry are difficult to identify unambiguously. In this work, using angle-resolved photoemission spectroscopy, we visualized the electronic structure of the ferromagnetic crystal Co3Sn2S2 and discovered its characteristic surface Fermi-arcs and linear bulk band dispersions across the Weyl points. These results establish Co3Sn2S2 as a magnetic Weyl semimetal that may serve as a platform for realizing phenomena such as chiral magnetic effects, unusually large anomalous Hall effect and quantum anomalous Hall effect.
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