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ID 56315
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Author
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
Abstract
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.
Note
This is an article published by American Physical Society
Published Date
2018-03-26
Publication Title
Physical Review B
Volume
volume97
Publisher
American Physical Society
Start Page
104511
ISSN
2469-9950
NCID
AA11187113
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
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publisher
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.1103/PhysRevB.97.104511