Evidence for chain superconductivity in near-stoichiometric YBa2Cu3Ox single crystals

被引：44

作者：

Breit, V

Schweiss, P

Hauff, R

Wuhl, H

Claus, H

Rietschel, H

Erb, A

MullerVogt, G

机构：

[1] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,INST NUKL FESTKORPERPHYS,D-76021 KARLSRUHE,GERMANY

[2] UNIV KARLSRUHE,INST EXPTL KERNPHYS,D-76128 KARLSRUHE,GERMANY

[3] UNIV KARLSRUHE,INST PHYS,D-76128 KARLSRUHE,GERMANY

[4] UNIV KARLSRUHE,FAK PHYS,KRISTALL & MAT LAB,D-76128 KARLSRUHE,GERMANY

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.52.R15727

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Specific-heat measurements on a high-quality, 63-mg YBa2Cu3Ox single crystal, in the range 6.94 less than or equal to x less than or equal to 7.0 (overdoped regime), are presented. The oxygen concentrations were determined independently by neutron scattering. It is observed that the mean-field value of the specific-heat jump at T-c increases by about 45% between 6.94 and 7.0. In contrast, T-c decreases by about 4%. It is also observed that the fluctuation contributions to the specific heat are greatly reduced near x=7.O. The observed behavior is attributed to induced superconductivity in the CuO chains.

引用

页码：15727 / 15730

页数：4

共 31 条

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