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Specific heat measurement of the layered nitride superconductor Li(x)ZrNCl | Y Taguchi
; M Hisakabe
; Y Iwasa
; | Date: |
3 Jun 2005 | Journal: | Phys Rev Lett, 94 (21), 217002 | Abstract: | Specific heat has been investigated in a layered nitride superconductor, Li(0.12)ZrNCl, with T(c)=12.7 K. The obtained data have shown a marked dichotomy: The specific heat jump at T(c) (DeltaC/gamma(n)T(c)=1.8) and the superconducting gap ratio (2Delta/k(B)T(c)=4.6-5.2) have indicated an intermediate to a strong coupling of electrons, while the upper limit of the electron-phonon coupling constant lambda has directly been estimated to be 0.22, which belongs to a weak coupling regime. Furthermore, the rapid increase of gamma as a function of magnetic field suggests that the present material has an anisotropic s wave gap. | Source: | PubMed, pmid16090340 | Services: | Forum | Review | Favorites |
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