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ID 16635
file
creator
Taguchi, Y.
Hisakabe, M.
Ohishi, Y.
Iwasa, Y.
NDC
Physics
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.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 70
issue
Issue 10
start page
104506
date of issued
2004-09
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2004 American Physical Society
relation url
department
Graduate School of Engineering