Electronic structures and photoemission spectroscopy

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Publisher Correction: A charge-density-wave topological semimetal

Nature Physics Springer Nature 17:2 (2021) 284-284

Authors:

Wujun Shi, Benjamin J Wieder, Holger L Meyerheim, Yan Sun, Yang Zhang, Yiwei Li, Lei Shen, Yanpeng Qi, Lexian Yang, Jagannath Jena, Peter Werner, Klaus Koepernik, Stuart Parkin, Yulin Chen, Claudia Felser, B Andrei Bernevig, Zhijun Wang
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A vacuum ultraviolet laser with a submicrometer spot for spatially resolved photoemission spectroscopy.

Light, science & applications 10:1 (2021) 22

Authors:

Yuanhao Mao, Dong Zhao, Shen Yan, Hongjia Zhang, Juan Li, Kai Han, Xiaojun Xu, Chuan Guo, Lexian Yang, Chaofan Zhang, Kun Huang, Yulin Chen

Abstract:

Vacuum ultraviolet (VUV) lasers have demonstrated great potential as the light source for various spectroscopies, which, if they can be focused into a small beam spot, will not only allow investigation of mesoscopic materials and structures but also find application in the manufacture of nano-objects with excellent precision. In this work, we report the construction of a 177 nm VUV laser that can achieve a record-small (~0.76 μm) focal spot at a long focal length (~45 mm) by using a flat lens without spherical aberration. The size of the beam spot of this VUV laser was tested using a metal grating and exfoliated graphene flakes, and we demonstrated its application in a fluorescence spectroscopy study on pure and Tm3+-doped NaYF4 microcrystals, revealing a new emission band that cannot be observed in the traditional up-conversion process. In addition, this laser system would be an ideal light source for spatially and angle-resolved photoemission spectroscopy.
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Electronic structures of topological quantum materials studied by ARPES

Chapter in Topological Insulator and Related Topics, Elsevier 108 (2021) 1-42

Authors:

Lexian Yang, Haifeng Yang, Yulin Chen
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Surface photovoltaic effect and electronic structure of β-InSe

Physical Review Materials American Physical Society (APS) 4:12 (2020) 124604

Authors:

L Kang, L Shen, YJ Chen, SC Sun, X Gu, HJ Zheng, ZK Liu, JX Wu, HL Peng, FW Zheng, P Zhang, LX Yang, YL Chen
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Observation of Topological Electronic Structure in Quasi-1D Superconductor TaSe3

Matter Elsevier 3:6 (2020) 2055-2065

Authors:

Cheng Chen, Aiji Liang, Shuai Liu, Simin Nie, Junwei Huang, Meixiao Wang, Yiwei Li, Ding Pei, Haifeng Yang, Huijun Zheng, Yong Zhang, Donghui Lu, Makoto Hashimoto, Alexei Barinov, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, Xufeng Kou, Lexian Yang, Yanfeng Guo, Zhijun Wang, Hongtao Yuan, Zhongkai Liu, Yulin Chen
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