Quadrupolar-fluctuation model for high- T sub c superconductivity: A quantum Monte Carlo study
- Department of Physics, The Ohio State University, 174 West 18th Avenue, Columbus, OH (USA)
We present results for quantum Monte Carlo simulations of the quadrupolar fluctuation model of high-temperature superconductivity. The simulations focused on measurement of the pairing susceptibility in various interesting pairing channels (on-site, nearest-neighbor, and second-nearest-neighbor {ital s}- and {ital d}-wave pairing). The lattice was 4{times}4 in the oxygen sites, with eight copper sites bearing quadrupole moments. Exchange of these quadrupolar fluctuations may lead to attraction between oxygen holes. As in weak-coupling theory, we find (i) favorable tendencies towards second-nearest-neighbor {ital s}- and {ital d}-wave filling, with larger doping favoring {ital d}-wave symmetry; (ii) a nonmonotonic dependence of the pairing tendencies upon the on-site quadrupole level splitting; and (iii) a strong suppression of all nearest-neighbor pairing.
- OSTI ID:
- 6195563
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Vol. 42:13; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
MATHEMATICAL MODELS
EXCHANGE INTERACTIONS
FLUCTUATIONS
MONTE CARLO METHOD
PAIRING INTERACTIONS
QUADRUPOLES
QUANTUM MECHANICS
SIMULATION
INTERACTIONS
MECHANICS
MULTIPOLES
SUPERCONDUCTORS
VARIATIONS
656100* - Condensed Matter Physics- Superconductivity