Magnetic Field Dependence of the Low-Temperature Specific Heat of the Borocarbide Superconductor LuNi2B2C

Minoru Nohara, Masanobu Isshiki, Hidenori Takagi, Robert J. Cava

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Abstract

The low temperature specific heat of the borocarbide superconductor LuNi2B2C was measured under various magnetic fields (H) up to 8 T. The coefficient of the T-linear term in specific heat in the mixed state shows marked deviations from the H-linear dependence expected for conventional superconductors and is found to obey a √H dependence. A good description of the data can be obtained by assuming the presence of a zero-gap region along lines on the Fermi surface, indicating the possibility of unconventional pairing in the superconducting state of the borocarbides.

Original languageEnglish (US)
Pages (from-to)1888-1891
Number of pages4
JournalJournal of the Physical Society of Japan
Volume66
Issue number7
DOIs
StatePublished - Jul 1997

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Keywords

  • Borocarbide superconductors
  • LuNiBC
  • Quasiparticle states
  • Specific heat

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