Thermal Expansion Coefficients of Bi$_2$Se$_3$ and Sb$_2$Te$_3$ Crystals from 10 K to 270 K

X. Chen; H. D. Zhou; A. Kiswandhi; I. Miotkowski; Y. P. Chen; P. A. Sharma; A. L. Lima Sharma; M. A. Hekmaty; D. Smirnov; Z. Jiang

doi:10.1063/1.3672198

paper

Thermal Expansion Coefficients of Bi $_{2}$ Se $_{3}$ and Sb $_{2}$ Te $_{3}$ Crystals from 10 K to 270 K

arXiv:1112.1608 · doi:10.1063/1.3672198

Abstract

Lattice constant of Bi $_{2}$ Se $_{3}$ and Sb $_{2}$ Te $_{3}$ crystals is determined by X-ray powder diffraction measurement in a wide temperature range. Linear thermal expansion coefficients ( $α$ ) of the crystals are extracted, and considerable anisotropy between $α_{∥}$ and $α_{⊥}$ is observed. The low temperature values of $α$ can be fit well by the Debye model, while an anomalous behavior at above 150 K is evidenced and explained. Grüneisen parameters of the materials are also estimated at room temperature.

3 pages, 3 figures

Thermal Expansion Coefficients of Bi2​Se3​ and Sb2​Te3​ Crystals from 10 K to 270 K

Abstract

Thermal Expansion Coefficients of Bi $_{2}$ Se $_{3}$ and Sb $_{2}$ Te $_{3}$ Crystals from 10 K to 270 K