High-pressure study of layered nitride superconductors

Physical Review B - Condensed Matter and Materials Physics 70 巻 10 号 104506- 頁 2004-09 発行
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タイトル ( eng )
High-pressure study of layered nitride superconductors
作成者
Taguchi Y.
Hisakabe M.
Ohishi Y.
Iwasa Y.
収録物名
Physical Review B - Condensed Matter and Materials Physics
70
10
開始ページ 104506
抄録
Pressure dependence of critical temperature, lattice constant, and phonon frequency has been investigated for layered nitride superconductors, ZrNCl 0.7 and Li0.5(THF)HfNCl. The analysis of the data in terms of MacMillan's theory indicated that the relevant phonon frequencies are low (≈50 and 100 cm-1, respectively), and that the electron-phonon coupling constant λ is larger than 3 in both compounds in sharp contrast with previous experimental and theoretical results. This result may suggest a possibility that other bosonic excitation than phonon additionally contributes to the pairing interaction in these materials.
NDC分類
物理学 [ 420 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
American Physical Society
発行日 2004-09
権利情報
Copyright (c) 2004 American Physical Society
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[NCID] AA11187113
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.70.104506
[DOI] http://dx.doi.org/10.1103/PhysRevB.70.104506