High-pressure study of layered nitride superconductors

Physical Review B - Condensed Matter and Materials Physics Volume 70 Issue 10 Page 104506- published_at 2004-09
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Title ( eng )
High-pressure study of layered nitride superconductors
Creator
Taguchi Y.
Hisakabe M.
Ohishi Y.
Iwasa Y.
Source Title
Physical Review B - Condensed Matter and Materials Physics
Volume 70
Issue 10
Start Page 104506
Abstract
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
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2004-09
Rights
Copyright (c) 2004 American Physical Society
Publish Type Version of Record
Access Rights open access
Source Identifier
[NCID] AA11187113
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.70.104506
[DOI] http://dx.doi.org/10.1103/PhysRevB.70.104506