Odd-parity singlet pairing in the positive- U Hubbard model
Journal Article
·
· Physical Review Letters; (USA)
- Department of Physics, University of California, Davis, California 95616 (USA)
- IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120 (USA)
We consider the possibility of an odd-parity singlet pairing in the positive-{ital U} Hubbard model, which naturally incorporates short-ranged antiferromagnetic correlations in the ground state. In a quantum Monte Carlo simulation of a nearly half-filled Hubbard model, we find that the repulsive {ital U} enhances the tendency for this type of pairing more strongly than for other pairing channels considered earlier. We propose a BCS-type wave function for this pairing where the gap has no nodes over the Fermi surface, and discuss various experimental consequences in connection to high-{ital T}{sub {ital c}} superconductivity.
- OSTI ID:
- 5535841
- Journal Information:
- Physical Review Letters; (USA), Vol. 67:3; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
BAND THEORY
ANTIFERROMAGNETISM
ENERGY GAP
FERMI LEVEL
MONTE CARLO METHOD
PAIRING INTERACTIONS
PARITY
ENERGY LEVELS
INTERACTIONS
MAGNETISM
PARTICLE PROPERTIES
SUPERCONDUCTORS
656100* - Condensed Matter Physics- Superconductivity
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
BAND THEORY
ANTIFERROMAGNETISM
ENERGY GAP
FERMI LEVEL
MONTE CARLO METHOD
PAIRING INTERACTIONS
PARITY
ENERGY LEVELS
INTERACTIONS
MAGNETISM
PARTICLE PROPERTIES
SUPERCONDUCTORS
656100* - Condensed Matter Physics- Superconductivity