Anisotropy and temperature dependence of H c2 in layer superconductor: Pure and Fe-doped 2 H-NbSe2

Y. Muto, K. Noto, H. Nakatsuji, N. Toyota

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9 Citations (Scopus)

Abstract

The positive curvature of the upper critical field H c2{norm of matrix} (parallel to the layer) and the temperature dependence of the ratio, H c2{norm of matrix}/H c2⊥, observed in pure NbSe2 can be accounted for by the Takanaka theory which includes anisotropies of both the Fermi velocity and the energy gap and the effect of nonlocality. In Fe-doped samples, the ratio H c2{norm of matrix}/H c2⊥ becomes almost constant, showing higher anisotropy than pure NbSe2 at higher-temperature region. The resistance anomaly observed around 30 K in pure NbSe2, which is believed to originate from the charge density wave (CDW) formation, is suppressed more rapidly than superconductivity by the addition of Fe impurities.

Original languageEnglish
Pages (from-to)503-510
Number of pages8
JournalIl Nuovo Cimento B Series 11
Volume38
Issue number2
DOIs
Publication statusPublished - 1977 Apr 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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