Small electronic specific heat in the electron doped Cu-oxide superconductors

M. Sera, S. Shamoto, M. Sato

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12 Citations (Scopus)

Abstract

The specific heat of the electron doped high-Tc Cu-oxides, Nd1.85Ce0.15CuO4 and Pr2-xCexCuO4 (0≤×≤0.25) has been studied, where the attention was focussed on the behaviors around the superconducting transition temperature Tc in the former and at low temperatures in the latter. The specific heat of Nd1.85Ce0.15CuO4 shows a very small jump at Tc from which the electronic specific heat coefficient γ was estimated to be ∼ 1.2mJ/mol K2 by assuming ΔC/Tc=1.43γ. The γ value of Pr2-xCexCuO4 was estimated from the low temperature specific heat data obtained in the normal state near the metallic region as ∼ 2mJ/mol K2 for x{reversed tilde equals}0.15, which is rather small compared to those of the hole doped Cu-oxide superconductors La2-xMxCuO4 (M=Ba or Sr). This indicates that the effective mass m* of the carriers in the electron doped system is smaller than those in the hole doped systems.

Original languageEnglish
Pages (from-to)749-752
Number of pages4
JournalSolid State Communications
Volume72
Issue number8
DOIs
Publication statusPublished - 1989 Nov

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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