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unige:114636 
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Specific heat of 2H-NbSe2 in high magnetic fields |
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| Published in | Physica B: Condensed Matter. 1995, vol. 204, no. 1-4, p. 167-175 | |
| Abstract | Recently, the unusual behaviour of the specific heat of the superconductors YBa₂Cu₃O₇, Y₂Ba₄Cu₇O₁₅, and YBa₂Cu₄O₈ at high field and low temperature was attributed to Zeeman splitting of localized states in the vortex cores. In an attempt to detect similar effects in classic high-κ superconductors, we have measured the mixed-state specific heat of NbSe₂ single crystals in magnetic fields up to Hc2(0). The specific heat in the superconducting state and zero field is found to follow accurately a strong-coupling model that takes into account the anisotropy of the gap. We analyse then the mixed-state specific heat using the London model. A small Schottky-like excess specific heat remains unexplained. In qualitative agreement with the observations made in Y-Ba-Cu-O, this contribution is suggested to originate from the localized vortex core levels observed by STM techniques. | |
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Article (Published version) (541 Kb) - Limited access to UNIGE Other version: http://linkinghub.elsevier.com/retrieve/pii/092145269400259X |
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| Citation (ISO format) | SANCHEZ, David et al. Specific heat of 2H-NbSe2 in high magnetic fields. In: Physica B: Condensed Matter, 1995, vol. 204, n° 1-4, p. 167-175. https://archive-ouverte.unige.ch/unige:114636 |
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