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ID 14260
file
creator
Tou, Hideki
Maniwa, Yutaka
NDC
Physics
abstract
We report 15N nuclear magnetic resonance (NMR) and the nitrogen-isotope effect studies on c-axis oriented sample of Li-doped HfNCl with superconducting transition temperature Tc~25.5 K. 15N NMR Knight shift decreases toward zero below Tc, giving evidence that the pairing symmetry is an even-parity spin singlet, and that the nitrogen site plays an important role in the occurrence of superconductivity. A nitrogen isotope shift is found to be quite small, ∇Tc~0.1 K (N = 0.07±0.02), which cannot reproduce such a high Tc within the traditional BCS framework.
journal title
Physical review. B
volume
Volume 67
start page
100509
date of issued
2003
publisher
The American Physical Society
issn
1098-0121
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2003 The American Physical Society
relation is version of URL
http://dx.doi.org/10.1103/PhysRevB.67.100509
department
Graduate School of Advanced Sciences of Matter
Graduate School of Engineering