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Superconductivity in Ba sub 1 minus x K sub x BiO sub 3

Journal Article · · Physical Review, B: Condensed Matter; (United States)
 [1];  [2]; ;  [3]
  1. Concurrent Computing Laboratory for Materials Simulations and Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001 (United States) Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  3. Concurrent Computing Laboratory for Materials Simulations and Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001 (United States)
+ Show Author Affiliations

Superconductivity in Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} is studied within the framework of Eliashberg theory using a model of the electron-phonon interaction, {alpha}{sup 2}{ital F}({omega}). The model is based upon molecular-dynamics calculations of the phonon density of states, which are in good agreement with inelastic-neutron-scattering experiments. The function {alpha}({omega}) is constructed using information from electron-tunneling experiments. Our model is constructed with the premise that the electron-phonon coupling constant {lambda}{approx}1 and that strong electron-phonon coupling exists for high-energy (30--60 meV) phonon modes. Superconducting properties of the material at zero and finite temperatures are calculated and compared with experiments.

OSTI ID:
5000751
Journal Information:
Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:10; ISSN PRBMD; ISSN 0163-1829
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
COUPLING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
GORKOV-ELIASHBERG THEORY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
SUPERCONDUCTIVITY