Quadrupolar-fluctuation model for high- T sub c superconductivity: A quantum Monte Carlo study

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.7960· OSTI ID:6195563

Jarrell, M; Cox, D L ^[1]

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1. 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), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:13; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
EXCHANGE INTERACTIONS
FLUCTUATIONS
HIGH-TC SUPERCONDUCTORS
INTERACTIONS
MATHEMATICAL MODELS
MECHANICS
MONTE CARLO METHOD
MULTIPOLES
PAIRING INTERACTIONS
QUADRUPOLES
QUANTUM MECHANICS
SIMULATION
SUPERCONDUCTORS
VARIATIONS