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

Journal Article · Mon Nov 04 00:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4829748· OSTI ID:22254123

Hamdou, Bacel; Gooth, Johannes; Dorn, August; Nielsch, Kornelius ^[1]; Pippel, Eckhard ^[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)

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.

• OSTI ID: 22254123
• Journal Information: Applied Physics Letters, Vol. 103, Issue 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AHARONOV-BOHM EFFECT
ANNEALING
BISMUTH TELLURIDES
CARRIER MOBILITY
ELECTRONS
MAGNETORESISTANCE
MONOCRYSTALS
OSCILLATIONS
QUANTUM WIRES
TOPOLOGY