Topological surface states and flat bands in the kagome superconductor CsV3Sb5

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Yong Hu
  • Samuel M.L. Teicher
  • Brenden R. Ortiz
  • Yang Luo
  • Shuting Peng
  • Linwei Huai
  • Nicholas C. Plumb
  • Stephen D. Wilson
  • Junfeng He
  • Ming Shi

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)495-500
Journal / PublicationScience Bulletin
Volume67
Issue number5
Online published30 Nov 2021
Publication statusPublished - 15 Mar 2022

Abstract

Exotic quantum phenomena may appear in material systems with multiple orders or phases, where the mutual interactions can give rise to new physics beyond that of each component. Here, we report spectroscopic evidence for a unique combination of topology and correlation effects in the kagome superconductor CsV3Sb5. Topologically nontrivial surface states are observed near the Fermi energy (EF), indicating that the topological physics may be active upon entering the superconducting state. Flat bands are observed, suggesting that electron correlation effects are also at play in this system. Our results reveal the peculiar electronic structure of CsV3Sb5, which holds the potential for realizing Majorana zero modes and anomalous superconducting states in kagome lattices. They also establish CsV3Sb5 as a unique platform for exploring the interactions between the charge order, topology, correlation effects and superconductivity.

Research Area(s)

  • ARPES, Charge density wave order, Kagome superconductors, Topologically nontrivial surface states

Citation Format(s)

Topological surface states and flat bands in the kagome superconductor CsV3Sb5. / Hu, Yong; Teicher, Samuel M.L.; Ortiz, Brenden R.; Luo, Yang; Peng, Shuting; Huai, Linwei; Ma, Junzhang; Plumb, Nicholas C.; Wilson, Stephen D.; He, Junfeng; Shi, Ming.

In: Science Bulletin, Vol. 67, No. 5, 15.03.2022, p. 495-500.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review