Existence of the Minimum Coefficient in Temperature Linear Term of Heat Capacity in Superconducting (La1–xBax)2CuO4

Tatsuo Kobayashi, Satoshi Kumayasu, Kiichi Amaya, Kenji Ishida, Yoshio Kitaoka, Kunisuke Asayama

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Abstract

In high-Tc superconductors (La1–xMx)2CuO4 (M = Ba, Sr), it has been reported that the heat capacity has a nonzero coefficient γ in the temperature linear term. We investigated the detailed dependence of γ on Ba doping. It was confirmed that γ becomes zero for undoped La2CuO4. With increasing Ba concentration x, γ increases markedly up to x=0.02 where the magnetic order almost disappears, while it decreases as superconductivity starts to appear and then has a minimum around x=0.04. With further increasing x, γ increases again. These results may be due to a combined effect of two different contributions to γ.

Original languageEnglish
Pages (from-to)2261-2263
Number of pages3
Journaljournal of the physical society of japan
Volume57
Issue number7
DOIs
Publication statusPublished - Jan 1 1988
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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