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  Evolution of Electronic Structure in Pristine and Rb-Reconstructed Surfaces of Kagome Metal RbV3Sb5

Yu, J., Xu, Z., Xiao, K., Yuan, Y., Yin, Q., Hu, Z., et al. (2022). Evolution of Electronic Structure in Pristine and Rb-Reconstructed Surfaces of Kagome Metal RbV3Sb5. Nano Letters, 22(3), 918-925. doi:10.1021/acs.nanolett.1c03535.

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Supporting information: (1) Annealing experiment, (2) computational methods and the electronic states for the bulk structure and Rb-1×1 thin film, (3) electronic states for Rb-1×1, Rb-√3×1, and Rb-√3×√3 thin films, and (4) effective masses of electron-like states around the Γ point
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https://doi.org/10.1021/acs.nanolett.1c03535 (Publisher version)
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 Creators:
Yu, J.1, 2, Author
Xu, Z.3, Author
Xiao, K.1, 2, Author
Yuan, Y.1, 2, Author
Yin, Q.4, Author
Hu, Z.1, 2, Author
Gong, C.4, Author
Guo, Y.1, 2, Author
Tu, Z.4, Author
Tang, P.3, 5, 6, Author              
Lei, H.4, Author
Xue, Q.-K.1, 2, 7, 8, Author
Li, W.1, 2, Author
Affiliations:
1State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, ou_persistent22              
2Frontier Science Center for Quantum Information, Beijing, ou_persistent22              
3School of Materials Science and Engineering, Beihang University, ou_persistent22              
4Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, ou_persistent22              
5Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
6Center for Free-Electron Laser Science, Hamburg, ou_persistent22              
7Beijing Academy of Quantum Information Sciences, ou_persistent22              
8Southern University of Science and Technology, Shenzhen, ou_persistent22              

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Free keywords: kagome metal, hole doping, orbital-selective band reconstruction, scanning tunneling microscopy
 Abstract: We report on in situ low-temperature (4 K) scanning tunneling microscope measurements of atomic and electronic structures of the cleaved surfaces of an alkali-based kagome metal RbV3Sb5 single crystals. We find that the dominant pristine surface exhibits Rb-1×1 structure, in which a unique unidirectional √3a0 charge order is discovered. As the sample temperature slightly rises, Rb-√3×1 and Rb-√3×√3 reconstructions form due to desorption of surface Rb atoms. Our conductance mapping results demonstrate that Rb desorption not only gives rise to hole doping but also reconstructs the electronic band structures. Surprisingly, we find a ubiquitous gap opening near the Fermi level in tunneling spectra on all the surfaces despite their large differences of hole-carrier concentration, indicating an orbital-selective band reconstruction in RbV3Sb5. The Rb desorption induced electronic reconstructions are further confirmed by our density functional theory calculations.

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Language(s): eng - English
 Dates: 2022-01-192021-09-122022-01-262022-02-09
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.nanolett.1c03535
arXiv: 2109.11286
 Degree: -

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Title: Nano Letters
  Abbreviation : Nano Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 22 (3) Sequence Number: - Start / End Page: 918 - 925 Identifier: ISSN: 1530-6984
CoNE: https://pure.mpg.de/cone/journals/resource/110978984570403