Thermal expansion coefficients of Bi2Se3 and Sb2Te3 crystals from 10 K to 270 K

被引:99
作者
Chen, X. [1 ]
Zhou, H. D. [2 ]
Kiswandhi, A. [2 ]
Miotkowski, I. [3 ]
Chen, Y. P. [3 ]
Sharma, P. A. [4 ]
Sharma, A. L. Lima [4 ]
Hekmaty, M. A. [5 ]
Smirnov, D. [2 ]
Jiang, Z. [1 ]
机构
[1] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
[2] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[3] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA
[4] Sandia Natl Labs, Albuquerque, NM 87185 USA
[5] Sandia Natl Labs, Livermore, CA 94550 USA
关键词
TOPOLOGICAL INSULATORS; BISMUTH TELLURIDE; BI2TE3;
D O I
10.1063/1.3672198
中图分类号
O59 [应用物理学];
学科分类号
摘要
Lattice constant of Bi2Se3 and Sb2Te3 crystals is determined by x-ray powder diffraction measurement in a wide temperature range. Linear thermal expansion coefficients (alpha) of the crystals are extracted, and considerable anisotropy between alpha(parallel to) and alpha(perpendicular to) is observed. The low temperature values of alpha can be fit well by the Debye model, while an anomalous behavior at above 150 K is evidenced and explained. Gruneisen parameters of the materials are also estimated at room temperature. (C) 2011 American Institute of Physics. [doi:10.1063/1.3672198]
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页数:3
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