Quantitative Analysis of Weak Antilocalization Effect of Topological Surface States in Topological Insulator BiSbTeSe 2

Hui Li, Huan Wen Wang, Yang Li, Huachen Zhang, Shuai Zhang, Xing Chen Pan, Bin Jia, Fengqi Song, Jiannong Wang

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Quantitative analysis of the weak antilocalization (WAL) effect of topological surface states in topological insulators is of tremendous importance. The major obstacle to achieve accurate results is how to eliminate the contribution of the anisotropic magnetoconductance of bulk states when the Fermi level lies in bulk bands. Here, we demonstrate that we can analyze quantitatively and accurately the WAL effect of topological surface states in topological insulator, BiSbTeSe 2 (BSTS), by measuring the anisotropic magnetoconductance. The anomalous conductance peaks induced by the WAL effect of topological surface states of BSTS together with the anisotropic magnetoconductance of bulk states have been observed. By subtracting the anisotropic magnetoconductance of bulk states, we are able to analyze the WAL effect of topological surface states using the Hikami-Larkin-Nagaoka expression. Our findings offer an alternative strategy for the quantitative exploration of the WAL effect of topological surface states in topological insulators.

Original languageEnglish
Pages (from-to)2450-2455
Number of pages6
JournalNano Letters
Volume19
Issue number4
DOIs
Publication statusPublished - 2019 Apr 10
Externally publishedYes

Keywords

  • Hikami-Larkin-Nagaoka expression
  • Topological insulators
  • anisotropic magnetoconductance
  • topological surface states
  • weak antilocalization effect

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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