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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| File | |
| 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.
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| NDC |
Physics [ 420 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2004-09 |
| Rights |
Copyright (c) 2004 American Physical Society
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| 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
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