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Title: Effect of antimony concentration on structural and transport properties of (Bi{sub 1-x}Sb{sub x}){sub 2}Te{sub 3} mixed crystal

Polycrystalline (Bi{sub 1-x}Sb{sub x}){sub 2}Te{sub 3} (0.60≤x≤0.68) alloys have been synthesized by solid state reaction method. Structural characterizations have been done using X-Ray Diffraction (XRD). Lattice parameter decreases with antimony (Sb) concentration. Sb doping leads to the modification in band structure and Fermi surface geometry. Band gap calculated from thermal variation of resistivity (ρ-T) data, decreases with Sb concentration. Sb concentration dependent power factor near room temperature have been calculated from obtained resistivity and thermopower data. Highest power factor obtained for (Bi{sub 0.40}Sb{sub 0.60}){sub 2}Te{sub 3} alloy.
Authors:
; ; ; ;  [1]
  1. Department of Physics, University of Calcutta, 92 A P C Road, Kolkata-700009 (India)
Publication Date:
OSTI Identifier:
22490518
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 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; ABUNDANCE; ANTIMONY; ANTIMONY TELLURIDES; BISMUTH TELLURIDES; CONCENTRATION RATIO; ELECTRIC CONDUCTIVITY; ELECTRONIC STRUCTURE; FERMI LEVEL; LATTICE PARAMETERS; POLYCRYSTALS; POWER FACTOR; SOLIDS; TEMPERATURE RANGE 0273-0400 K; VARIATIONS; X-RAY DIFFRACTION