Pressure Induced Structural Transitions in CuSbS2 and CuSbSe2 Thermoelectric Compounds

Authors

Jason Baker, University of Nevada, Las VegasFollow
Ravhi S. Kumar, University of Nevada, Las VegasFollow
Daniel Sneed, University of Nevada, Las VegasFollow
Anthony Connolly, University of Nevada, Las Vegas
Yi Zhang, University of Nevada, Las Vegas
Nenad Velisavljevic, Los Alamos National LaboratoryFollow
Jayalakshmi Paladugu, University of Nevada, Las VegasFollow
Michael G. Pravica, University of Nevada, Las VegasFollow
Changfeng Chen, University of Nevada, Las VegasFollow
Andrew Cornelius, University of Nevada, Las VegasFollow
Yusheng Zhao, University of Nevada, Las VegasFollow

Document Type

Article

Publication Date

9-15-2015

Publication Title

Journal of Alloys and Compounds

Volume

643

First page number:

186

Last page number:

194

Abstract

We have investigated the structural behavior of CuSbS2 and CuSbSe2 thermoelectric materials under high pressure conditions up to 80 GPa using angle dispersive X-ray diffraction in a diamond anvil cell (DAC). We have also performed high pressure Raman spectroscopy measurements up to 16 GPa. We observed a pressure-induced structural transformation from the ambient orthorhombic structure with space group Pnma to a triclinic type structure with space group P1 beginning around 8 GPa in both samples and completing at 13 GPa and 10 GPa in CuSbS2 and CuSbSe2, respectively. High pressure Raman experiments complement the transitions observed by high pressure X-ray diffraction (HPXRD). The transitions were found to be reversible on releasing the pressure to ambient in the DAC. The bulk modulus and compressibility of these materials are further discussed.

Keywords

Thermoelectrics; Structural phase transition; High pressure powder diffraction

Repository Citation

Baker, J., Kumar, R. S., Sneed, D., Connolly, A., Zhang, Y., Velisavljevic, N., Paladugu, J., Pravica, M. G., Chen, C., Cornelius, A., Zhao, Y. (2015). Pressure Induced Structural Transitions in CuSbS2 and CuSbSe2 Thermoelectric Compounds. Journal of Alloys and Compounds, 643 186-194.
http://dx.doi.org/10.1016/j.jallcom.2015.04.138