首页|Angle-resolved photoemission study of NbGeSb with non-symmorphic symmetry

Angle-resolved photoemission study of NbGeSb with non-symmorphic symmetry

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We investigate the electronic structure of NbGeSb with non-symmorphic symmetry.We employ angle-resolved pho-toemission spectroscopy(ARPES)to observe and identify the bulk and surface states over the Brillouin zone.By utilizing high-energy photons,we identify the bulk Fermi surface and bulk nodal line along the direction X-R,while the Fermi surface of the surface state is observed by using low-energy photons.We observe the splitting of surface bands away from the high-symmetry point(X).The density functional theory calculations on bulk and 1 to 5-layer slab models,as well as spin textures of NbGeSb,verify that the band splitting could be attributed to the Rashba-like spin-orbit coupling caused by space-inversion-symmetry breaking at the surface.These splitted surface bands cross with each other,form-ing two-dimensional Weyl-like crossings that are protected by mirror symmetry.Our findings provide insights into the two-dimensional topological and symmetry-protected band inversion of surface states.

non-symmorphic symmetrynodal linesplitting of surface bandsangle-resolved photoemission spectroscopy

马欢、谭宁、吴徐传、李满、王义炎、路洪艳、夏天龙、王善才

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Department of Physics,Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education),Renmin University of China,Beijing 100872,China

Beijing Key Laboratory of Opto-Electronic Functional Materials & Micro-Nano Devices,Renmin University of China,Beijing 100872,China

School of Information Network Security,People's Public Security University of China,Beijing 100038,China

Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China

School of Physics and Physical Engineering,Qufu Normal University,Qufu 273165,China

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National Key Research and Development Program of ChinaFundamental Research Funds for the Central UniversitiesResearch Funds of Renmin University of ChinaHPC Cluster of ITP-CASNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesResearch Funds of People's Public Security University of China(PPSUC)National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaMajor Basic Program of Natural Science Foundation of Shandong ProvinceProject of Introduction and Cultivation for Young Innovative Talents in Colleges and Universities of Shandong Province

2022YFA140380322XNH099122045362023JKF02ZK092019YFA030860212074425118744221210401112074213ZR2021ZD01

2024

10.1088/1674-1056/ad0ccf

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(2)
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