Evidence for chain superconductivity in near-stoichiometric <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">YBa</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Cu</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mi mathvariant="italic">x</mi></mrow></msub></mrow></math> single crystals

V. Breit; P. Schweiss; R. Hauff; H. Wühl; H. Claus; H. Rietschel; A. Erb; G. Müller-Vogt

doi:10.1103/PhysRevB.52.R15727

Rapid Communication

Evidence for chain superconductivity in near-stoichiometric ${YBa}_{2}$ ${Cu}_{3}$ $O_{x}$ single crystals

V. Breit, P. Schweiss, R. Hauff, H. Wühl, H. Claus, H. Rietschel, A. Erb, and G. Müller-Vogt

Phys. Rev. B 52, R15727(R) – Published 1 December 1995

Abstract

Specific-heat measurements on a high-quality, 63-mg ${YBa}_{2}$ ${Cu}_{3}$ $O_{x}$ single crystal, in the range 6.94≤x≤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=7.0. The observed behavior is attributed to induced superconductivity in the CuO chains.

Received 6 September 1995

DOI:https://doi.org/10.1103/PhysRevB.52.R15727

Authors & Affiliations

V. Breit

Forschungszentrum Karlsruhe, Institut für Technische Physik, D-76021 Karlsruhe, Germany

P. Schweiss

Forschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, D-76021 Karlsruhe, Germany

R. Hauff

Forschungszentrum Karlsruhe, Institut für Technische Physik, D-76021 Karlsruhe, Germany

H. Wühl

Forschungszentrum Karlsruhe, Institut für Technische Physik, D-76021 Karlsruhe, Germany
Institut für Experimentelle Kernphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany

H. Claus

Forschungszentrum Karlsruhe, Institut für Technische Physik, D-76021 Karlsruhe, Germany
Physikalisches Institut, Universität Karlsruhe, D-76128 Karlsruhe, Germany

H. Rietschel

Forschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, D-76021 Karlsruhe, Germany

A. Erb and G. Müller-Vogt

Kristall- und Materiallabor der Fakultät für Physik, Universität Karlsruhe, D-76128 Karlsruhe, Germany

References (Subscription Required)

Click to Expand

Issue

Vol. 52, Iss. 22 — 1 December 1995

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review B

covering condensed matter and materials physics