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ID 56315
フルテキストURL
著者
Kobayashi, Kaya Research Institute for Interdisciplinary Science, Okayama University
Ai, Yukio Department of Physics, Okayama University
Jeschke, Harald O. Research Institute for Interdisciplinary Science, Okayama University
Akimitsu, Jun Research Institute for Interdisciplinary Science, Okayama University
抄録
We investigate superconductivity in In1-xSnxTe (x <= 0.5) synthesized at high pressures of up to 2 GPa and observe an enhancement of the superconducting transition temperature T-c for increasing tin concentration x. These compounds have not been accessible in rocksalt structure via conventional ambient pressure synthesis. While the lattice constant smoothly increases with x, T-c saturates around x = 0.4. Electronic structure calculations indicate that the Tc modulation is brought on by the change of the density of states in the vicinity of the Fermi energy [N(E-F)]. However, differences between the calculated N(E-F) and the observed electronic specific-heat coefficient indicate that the phonon dispersion plays an important role in the system and that the mechanism of superconductivity may not be the same in the entire doping range.
備考
This is an article published by American Physical Society
発行日
2018-03-26
出版物タイトル
Physical Review B
97巻
出版者
American Physical Society
開始ページ
104511
ISSN
2469-9950
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
Web of Sience KeyUT
関連URL
isVersionOf https://doi.org/10.1103/PhysRevB.97.104511