Superconducting characteristics in electron-doped layered hafnium nitride : 15N isotope effect studies
Physical review. B Volume 67
Page 100509-
published_at 2003
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| File | |
| Title ( eng ) |
Superconducting characteristics in electron-doped layered hafnium nitride : 15N isotope effect studies
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| Creator |
Tou Hideki
Maniwa Yutaka
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| Source Title |
Physical review. B
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| Volume | 67 |
| Start Page | 100509 |
| 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.
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| NDC |
Physics [ 420 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
The American Physical Society
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| Date of Issued | 2003 |
| Rights |
Copyright (c) 2003 The American Physical Society
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.67.100509
[DOI] http://dx.doi.org/10.1103/PhysRevB.67.100509
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