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ID 56337
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Terashima, K. Research Institute for Interdisciplinary Science, Okayama University
Paris, E. Dipartimento di Fisica, Universitá di Roma “La Sapienza”
Simonelli, L. CELLS - ALBA Synchrotron Radiation Facility
Salas-Colera, E. Spanish CRG BM25 Spline, ESRF - The European Synchrotron
Puri, A. CRG-LISA, ESRF
Wakita, T. Research Institute for Interdisciplinary Science, Okayama University
Yamada, Y. Research Institute for Interdisciplinary Science, Okayama University
Nakano, S. Research Institute for Interdisciplinary Science, Okayama University
Idei, H. Research Institute for Interdisciplinary Science, Okayama University
Kudo, K. Research Institute for Interdisciplinary Science, Okayama University
Nohara, M. Research Institute for Interdisciplinary Science, Okayama University
Muraoka, Y. Research Institute for Interdisciplinary Science, Okayama University
Mizokawa, T. Department of Applied Physics, Waseda University
Yokoya, T. Research Institute for Interdisciplinary Science, Okayama University
Saini, N. L. Dipartimento di Fisica, Universitá di Roma “La Sapienza”
Abstract
The local structures of 122-type paradium arsenides, namely BaPd2As2 and SrPd2As2, are examined by As K-edge extended x-ray absorption fine structure measurements to find a possible correlation between the variation of their superconducting transition temperature and the local structure. The local atomic distances are found to be consistent with average distances measured by diffraction techniques. The temperature dependence of mean square relative displacements reveal that, while BaPd2As2 is characterized by a local As-Pd soft mode, albeit with larger atomic disorder, SrPd2As2 shows anomalous As-Pd correlations with a kink at similar to 160 K due to hardening by raising temperature. We have discussed implications of these results and possible mechanisms of differing superconducting transition temperature in relation with the structural instability.
Note
This is an article published by American Physical Society
Published Date
2018-09-28
Publication Title
Physical Review B
Volume
volume98
Issue
issue9
Publisher
American Physical Society
Start Page
094525
ISSN
24699950
NCID
AA11187113
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
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publisher
DOI
Web of Sience KeyUT
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isVersionOf https://doi.org/10.1103/PhysRevB.98.094525