Electronic structure of the high-T/sub c/ superconductor Ba/sub 1-//sub x/K/sub x/BiO/sub 3/

Journal Article · Mon Jun 20 04:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.60.2681· OSTI ID:7201660

Mattheiss, L F; Hamann, D R

Band-structure results for ordered Ba/sub 0.5/K/sub 0.5/BiO/sub 3/ alloys confirm that the antibonding Bi(6s)-O(2p) conduction band near E/sub F/ in cubic BaBiO/sub 3/ is minimally affected by substitutional K doping at the A (Ba) site. This supports the prediction that A-site doping would extend the metallic range of Ba/sub 1-//sub x/K/sub x/BiO/sub 3/ closer to half filling (BaBiO/sub 3/) than B-site doping (BaPb/sub 1-//sub y/Bi/sub y/O/sub 3/), thereby increasing the coupling of the conduction electrons to bond-stretching O phonons and T/sub c/. Ba/sub 1-//sub x/T/sub x/PbO/sub 3/, where T is trivalent, might also exhibit favorable superconducting properties.

• Research Organization: ATandT Bell Laboratories, Murray Hill, New Jersey 07974
• OSTI ID: 7201660
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 60:25; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
OXIDES
OXYGEN COMPOUNDS
POTASSIUM ADDITIONS
POTASSIUM ALLOYS
POTASSIUM COMPOUNDS
SUPERCONDUCTORS
SUPERLATTICES