Electronic specific heat of YBCO(6+x) from 1.8 to 300 K.

Author(s) : LORAM J. W., MIRZA K. A., COOPER J. R., LIANG W. Y., WADE J. M.

Type of article: Article

Summary

The authors have determined for the first time the electronic specific heat for x between 0.16 and 0.97 from 1.8 to 300 K. Weakly superconducting behaviour between x = 0.4 and 0.8 progresses rapidly to strong coupling BCS-lyke superconducting and metallic normal state behaviour for x higher or equal to 0.9. However, the continuous development of the entropy S(x, T) suggests a progressive modification of the low-energy spin spectrum rather than a simple band model. Pseudogap behaviour in S(x, T) observed over a temperature region above critical temperature reflects normal-state correlations apparently unrelated to the superconducting pairing.

Details

Original title: Electronic specific heat of YBCO(6+x) from 1.8 to 300 K.
Record ID : 1995-1401
Languages: English
Source: J. Supercond. - vol. 7 - n. 1
Publication date: 1994/02
Document available for consultation in the library of the IIR headquarters only.

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Indexing

Themes: Low-temperature physics;
Superconduction
Keywords: Superconduction; Electronics; Cryotemperature; YBCO; Superconductor; High temperature; Fermi; Specific heat