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Title: Surface state dominated transport in topological insulator Bi{sub 2}Te{sub 3} nanowires

We report on low temperature magnetoresistance measurements on single-crystalline Bi{sub 2}Te{sub 3} nanowires synthesized via catalytic growth and post-annealing in a Te-rich atmosphere. The observation of Aharonov-Bohm oscillations indicates the presence of topological surface states. Analyses of Subnikov-de Haas oscillations in perpendicular magnetoresistance yield extremely low two-dimensional carrier concentrations and effective electron masses, and very high carrier mobilities. All our findings are in excellent agreement with theoretical predictions of massless Dirac fermions at the surfaces of topological insulators.
Authors:
; ; ;  [1] ;  [2]
  1. Institute of Applied Physics, University of Hamburg, Jungiusstrasse 11, 20355 Hamburg (Germany)
  2. Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Germany)
Publication Date:
OSTI Identifier:
22254123
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AHARONOV-BOHM EFFECT; ANNEALING; BISMUTH TELLURIDES; CARRIER MOBILITY; ELECTRONS; MAGNETORESISTANCE; MONOCRYSTALS; OSCILLATIONS; QUANTUM WIRES; TOPOLOGY