Electronic structures and photoemission spectroscopy

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Observation of dimension-crossover of a tunable 1D Dirac fermion in topological semimetal NbSixTe2

NPJ QUANTUM MATERIALS 7:1 (2022) ARTN 54

Authors:

Jing Zhang, Yangyang Lv, Xiaolong Feng, Aiji Liang, Wei Xia, Sung-Kwan Mo, Cheng Chen, Jiamin Xue, Shengyuan A Yang, Lexian Yang, Yanfeng Guo, Yanbin Chen, Yulin Chen, Zhongkai Liu
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Observation of nontrivial topological electronic structure of orthorhombic SnSe

PHYSICAL REVIEW MATERIALS 6:5 (2022) ARTN 054201

Authors:

HJ Zheng, WJ Shi, CW Wang, YY Lv, W Xia, BH Li, F Wu, SM He, K Huang, ST Cui, C Chen, HF Yang, AJ Liang, MX Wang, Z Sun, SH Yao, YB Chen, YF Guo, QX Mi, LX Yang, MS Bahramy, ZK Liu, YL Chen
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Pressure-induced superconductivity in the noncentrosymmetric Weyl semimetals LaAlX (X = Si, Ge)

PHYSICAL REVIEW B 105:17 (2022) ARTN 174502

Authors:

Weizheng Cao, Ningning Zhao, Cuiying Pei, Qi Wang, Qinghua Zhang, Tianping Ying, Yi Zhao, Lingling Gao, Changhua Li, Na Yu, Lin Gu, Yulin Chen, Kai Liu, Yanpeng Qi
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Measurement of electronic structure in van der Waals ferromagnet Fe5–x GeTe2

Chinese Physics B IOP Publishing 31:5 (2022) 057404

Authors:

Kui Huang, Zhenxian Li, Deping Guo, Haifeng Yang, Yiwei Li, Aiji Liang, Fan Wu, Lixuan Xu, Lexian Yang, Wei Ji, Yanfeng Guo, Yulin Chen, Zhongkai Liu
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Robust kagome electronic structure in the topological quantum magnets XMn6Sn6 (X=Dy,Tb,Gd, Y)

Physical Review B 105:15 (2022)

Authors:

X Gu, C Chen, WS Wei, LL Gao, JY Liu, X Du, D Pei, JS Zhou, RZ Xu, ZX Yin, WX Zhao, YD Li, C Jozwiak, A Bostwick, E Rotenberg, D Backes, LSI Veiga, S Dhesi, T Hesjedal, G Van Der Laan, HF Du, WJ Jiang, YP Qi, G Li, WJ Shi, ZK Liu, YL Chen, LX Yang

Abstract:

Crystal geometry can greatly influence the emergent properties of quantum materials. As an example, the kagome lattice is an ideal platform to study the rich interplay between topology, magnetism, and electronic correlation. In this work, combining high-resolution angle-resolved photoemission spectroscopy and ab initio calculation, we systematically investigate the electronic structure of XMn6Sn6 (X=Dy,Tb,Gd,Y) family compounds. We observe the Dirac fermion and the flat band arising from the magnetic kagome lattice of Mn atoms. Interestingly, the flat band locates in the same energy region in all compounds studied, regardless of their different magnetic ground states and 4f electronic configurations. These observations suggest a robust Mn magnetic kagome lattice across the XMn6Sn6 family, thus providing an ideal platform for the search for, and investigation of, new emergent phenomena in magnetic topological materials.
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