Existence of the minimum coefficient in temperature linear term of heat capacity in superconducting (La1-xBax)2CuO 4

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 y 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
Publication statusPublished - Jul 1988
Externally publishedYes

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specific heat
coefficients
superconductivity
temperature

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Existence of the minimum coefficient in temperature linear term of heat capacity in superconducting (La1-xBax)2CuO 4. / Kobayashi, Tatsuo; Kumayasu, Satoshi; Amaya, Kiichi; Ishida, Kenji; Kitaoka, Yoshio; Asayama, Kunisuke.

In: Journal of the Physical Society of Japan, Vol. 57, No. 7, 07.1988, p. 2261-2263.

Research output: Contribution to journalArticle

Kobayashi, Tatsuo ; Kumayasu, Satoshi ; Amaya, Kiichi ; Ishida, Kenji ; Kitaoka, Yoshio ; Asayama, Kunisuke. / Existence of the minimum coefficient in temperature linear term of heat capacity in superconducting (La1-xBax)2CuO 4. In: Journal of the Physical Society of Japan. 1988 ; Vol. 57, No. 7. pp. 2261-2263.
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