標題: EXAFS study of thermoelectric BiCuOSe: Effects of Cu vacancies
作者: 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
關鍵字: Semiconductors;EXAFS;Synchrotron radiation;X-ray spectroscopies
公開日期: 1-Mar-2015
摘要: 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
期刊: SOLID STATE COMMUNICATIONS
Volume: 206
起始頁: 12
結束頁: 16
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