Evidence for quasi-two-dimensional superconductivity in electron-doped Li0.48(THF)yHfNCl

Physical review. Third series. B, Condensed matter and materials physics Volume 63 Issue 2 Page 020508- published_at 2001-01-01
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Title ( eng )
Evidence for quasi-two-dimensional superconductivity in electron-doped Li0.48(THF)yHfNCl
Creator
Tou Hideki
Maniwa Y.
Koiwasaki T.
Source Title
Physical review. Third series. B, Condensed matter and materials physics
Volume 63
Issue 2
Start Page 020508
Abstract
Dc-magnetization and NMR measurements were carried out on a layered superconductor Li0.48(THF)yHfNCl having Tc∼26 K. For the magnetic field applied perpendicular to the basal plane (ab plane) above 10 kOe, we found a pronounced broadening of the superconducting transition in temperature dependence of magnetization and the substantial diamagnetic signals were observed as high as 2Tc, indicating the existence of superconducting fluctuations. Analysis based on the anisotropic Ginzburg-Landau model reveals that the present system is a highly anisotropic superconductor. 7Li-NMR signals were observed around zero Knight shift, indicating that the local Fermi-level density of states, N(EF), at Li site is practically nothing and the superconductivity is derived from the HfNCl layer. We have shown the unambiguous evidence for the quasi-two-dimensional superconducting character in this system.
NDC
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2001-01-01
Rights
Copyright (c) 2000 The American Physical Society
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.63.020508
[DOI] http://dx.doi.org/10.1103/PhysRevB.63.020508