Title: | EXAFS study of thermoelectric BiCuOSe: Effects of Cu vacancies |
Authors: | Chou, Ta-Lei Tewari, Girish C. Chan, Ting-Shan Hsu, Ying-Ya Yamauchi, Hisao Karppinen, Maarit 加速器光源科技與應用學位學程 Master and Ph.D. Program for Science and Technology of Accelrrator Light Source |
Keywords: | Semiconductors;EXAFS;Synchrotron radiation;X-ray spectroscopies |
Issue Date: | 1-Mar-2015 |
Abstract: | Excellent thermoelectric performance has been reported for the ZrCuSiAs-type BiCuOSe derivatives; for these materials the transport properties can be effectively adjusted by chemical substitutions or by introducing Cu vacancies. In this work we compare stoichiometric BiCuSeO and its Cu-deficient derivative BiCu0.95SeO by utilizing temperature dependent extended X-ray absorption fine structure (EXAFS) measurements. Such a local probe evidences that Cu vacancies make the lattice more ductile and susceptible to temperature variation. (C) 2015 Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.ssc.2015.01.007 http://hdl.handle.net/11536/124311 |
ISSN: | 0038-1098 |
DOI: | 10.1016/j.ssc.2015.01.007 |
Journal: | SOLID STATE COMMUNICATIONS |
Volume: | 206 |
Begin Page: | 12 |
End Page: | 16 |
Appears in Collections: | Articles |