Van Hove singularities and high-T sub c superconductivity; A review

Journal Article · Sat Jul 20 04:00:00 EDT 1991 · International Journal of Modern Physics B; (United States)

DOI:https://doi.org/10.1142/S0217979291000791· OSTI ID:5162984

Markiewicz, R S ^[1]

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1. Physics Dept. and Barnett Inst., Northeastern Univ., Boston, MA (US)

This paper describes a Fermi liquid picture of high-T{sub c} superconductivity. A density-of-states (dos) peak associated with the CuO{sub 2}-plane van Hove singularity causes a peak in T{sub c} as a function of hole doping. Strong correlation effects drive a Mott transition at half filling. For intermediate doping, the electronic system is unstable against phase separation, with one phase near the insulating state, the other near the t{sub c} peak. The large dos leads to competition between superconductivity and structural instability, in analogy with the A15 compounds. The superconductivity appears to be driven by strong electron-phonon coupling, enhanced by fluctuation effects.

• OSTI ID: 5162984
• Journal Information: International Journal of Modern Physics B; (United States), Journal Name: International Journal of Modern Physics B; (United States) Vol. 5:12; ISSN 0217-9792; ISSN IJPBE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
COPPER COMPOUNDS
COUPLING
CRYSTAL DOPING
CUPRATES
DOCUMENT TYPES
ELECTRON-PHONON COUPLING
ENERGY-LEVEL DENSITY
FERMI GAS
FLUCTUATIONS
FLUIDS
GASES
HIGH-TC SUPERCONDUCTORS
HOLES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
REVIEWS
SINGULARITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VAN HOVE THEORY
VARIATIONS