Lattice instabilities and structural phase transformations in La sub 2 CuO sub 4 superconductors and insulators

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5523959

Axe, J D

Soft-mode structural phase transformations, common in many perovskite-based materials, are also found in La{sub 2}CuO{sub 4} and structurally related oxides. The resulting phase behavior is rather complex, but is a natural consequence of the degeneracy of the soft phonon order parameters. This paper reviews the structural and lattice-dynamical results and their interpretation based upon mean-field statistical mechanical models.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5523959
• Report Number(s): BNL-47128; CONF-920141-4; ON: DE92010045
• Resource Relation: Conference: Lattice effects in high Tc superconductors, Santa Fe, NM (United States), 13-15 Jan 1992
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
PHASE TRANSFORMATIONS
LANTHANUM COMPOUNDS
INSTABILITY
COPPER OXIDES
ELECTRICAL INSULATION
GINZBURG-PITAEVSKII THEORY
PHASE DIAGRAMS
PHASE STABILITY
PHONONS
TEMPERATURE DEPENDENCE
CHALCOGENIDES
COPPER COMPOUNDS
DIAGRAMS
OXIDES
OXYGEN COMPOUNDS
QUASI PARTICLES
RARE EARTH COMPOUNDS
STABILITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
665411* - Basic Superconductivity Studies- (1992-)
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)