Cuprate superconductors. Universal properties and trends; evidence for Bose-Einstein condensation

Conference · Wed Jun 01 00:00:00 EDT 1994 · Journal of Superconductivity; (United States)

OSTI ID:7103633

Schneider, T; Pedersen, M H ^[1]

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1. IBM Research Division, Rueschlikon (Switzerland)

We explore the compatibility of empirical trends in various thermodynamic properties of cuprate superconductors with the Bose-Einstein condensation scenario. These trends include the relations between transition temperature, hole concentration and condensate density, the rise and the upper limit of the transition temperature, the dependence of pressure and isotope coefficients on transition temperature, as well as the observed critical behavior, which is reminiscent of three-dimensional systems with a scalar complex order parameter and short-range interactions. For this purpose we consider an interacting charged Bose gas. Due to the high polarizability of the cuprates, the Coulomb interaction is strongly screened. For this reason, the problem of calculating thermodynamic properties becomes essentially equivalent to that of the uncharged gas with short-range interactions. This problem, however, has not been solved either. Nevertheless, in the dilute limit the problem reduces to the ideal Bose gas treated by Schafroth, while in the dense regime condensation and superfluidity are suppressed because bosons of finite extension fill the available volume. This limiting behavior provides an interpolation scheme for the dependence of both transition temperature and zero temperature superfluid density on boson density. 23 refs., 5 figs.

• OSTI ID: 7103633
• Report Number(s): CONF-930710-; CODEN: JOUSEH; TRN: 94-016444
• Journal Information: Journal of Superconductivity; (United States), Vol. 7:3; Conference: Physics and chemistry of molecular and oxide superconductors conference, Eugene, OR (United States), 27-31 Jul 1993; ISSN 0896-1107
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
HIGH-TC SUPERCONDUCTORS
MATHEMATICAL MODELS
THERMODYNAMIC PROPERTIES
BARIUM COMPOUNDS
BOSE-EINSTEIN CONDENSATION
BOSONS
CUPRATES
HARTREE-FOCK METHOD
HOLES
ISOTOPES
LANTHANUM COMPOUNDS
STRONTIUM COMPOUNDS
SUPERCONDUCTING FILMS
THALLIUM COMPOUNDS
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
CALCULATION METHODS
COPPER COMPOUNDS
FILMS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
360204 - Ceramics
Cermets
& Refractories- Physical Properties
990200 - Mathematics & Computers