Possibility of a common origin to ferroelectricity and superconductivity in oxides

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.207· OSTI ID:6481365

Bussmann-Holder, A; Simon, A; Buettner, H

We describe an extension of a lattice dynamical model for displacive-type ferroelectrics which might be applied to high-temperature superconductors. The model is based on the instability of the oxygen ion O/sup 2-/, dynamically described by an on-site nonlinear electron-ion coupling, and on the valence instability of the cation (e.g., Cu(I), Cu(III)), represented by a nonlinear electron-electron interaction which provides a pairwise coupling of the electrons. The equivalent quantum-mechanical Hamiltonian describes an extended Peierls-Hubbard system. The most important outcome of the model is that a ferroelectric instability is a necessary condition for paired electron states which indicate the possibility of superconductivity. Depending on the strength of the coupling constants, either a ferroelectric or a superconducting state results.

• Research Organization: Universitaet Bayreuth and Max-Planck-Institut fuer Festkoerperforschung, 7000 Stuttgart 80, Federal Republic of Germany
• OSTI ID: 6481365
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER OXIDES
COUPLING CONSTANTS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-ELECTRON COUPLING
ELECTRON-ELECTRON INTERACTIONS
ELECTRON-ION COUPLING
FERROELECTRIC MATERIALS
HAMILTONIANS
INSTABILITY
INTERACTIONS
IONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL OPERATORS
MECHANICS
NONLINEAR PROBLEMS
OXIDES
OXYGEN COMPOUNDS
OXYGEN IONS
PARTICLE INTERACTIONS
PHYSICAL PROPERTIES
QUANTUM MECHANICS
QUANTUM OPERATORS
STRUCTURAL MODELS
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS