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Title: Crossover between two-dimensional surface state and three-dimensional bulk phase in Fe-doped Bi{sub 2}Te{sub 3}

In Fe-doped Bi{sub 2}Te{sub 3}, we have observed higher mobility, larger linear magnetoresistance, and anomalous quantum oscillations. The angle dependence of Shubnikov-de Haas (SdH) oscillations gives two different periodicities depending on the angle from the c-axis. The low-angle SdH period is identified with a surface origin, while the high-angle period is against the surface origin. The high-angle SdH period well agrees with the de Haas-van Alphen (dHvA) period with a bulk origin. The physical parameters obtained from the quantum oscillations support the crossover between two-dimensional surface state and three-dimensional bulk phase by Fe doping in Bi{sub 2}Te{sub 3}.
Authors:
; ;  [1] ; ; ;  [2]
  1. Department of Physics, Sogang University, Seoul 121-742 (Korea, Republic of)
  2. Korea Research Institute of Standard Science, Daejeon 305-340 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22303862
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 25; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH TELLURIDES; CARRIER MOBILITY; DE HAAS-VAN ALPHEN EFFECT; DOPED MATERIALS; IRON ADDITIONS; MAGNETORESISTANCE; OSCILLATIONS; PERIODICITY; SHUBNIKOV-DE HAAS EFFECT; SURFACES