フルテキストURL PhysRevB_97_094525.pdf
著者 Terashima, K.| Paris, E.| Simonelli, L.| Salas-Colera, E.| Puri, A.| Wakita, T.| Yamada, Y.| Nakano, S.| Idei, H.| Kudo, K.| Nohara, M.| Muraoka, Y.| Mizokawa, T.| Yokoya, T.| Saini, N. L.|
抄録 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.
備考 This is an article published by American Physical Society
発行日 2018-09-28
出版物タイトル Physical Review B
98巻
9号
出版者 American Physical Society
開始ページ 094525
ISSN 24699950
NCID AA11187113
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
論文のバージョン publisher
DOI 10.1103/PhysRevB.98.094525
Web of Sience KeyUT 000446178800008
関連URL isVersionOf https://doi.org/10.1103/PhysRevB.98.094525