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

M. Sera, S. Shamoto, M. Sato

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)749-752
頁數4
期刊Solid State Communications
72
發行號8
DOIs
出版狀態Published - 1989 11月

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 凝聚態物理學
  • 材料化學

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