Variations of [ital T][sub [ital c]] for changes in the spin-fluctuation spectral weight

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.10339· OSTI ID:6907806

Monthoux, P ^[1]; Scalapino, D J ^[2]

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1. Institute for Theoretical Physics, University of California, Santa Barbara, California 93106-4030 (United States)
2. Department of Physics, University of California, Santa Barbara, California 93106-9530 (United States)

We consider a two-dimensional Hubbard model within a conserving spin-fluctuation exchange approximation and determine the change in the [ital d][sub [ital x]][sup 2][minus][ital y][sup 2] superconducting transition temperature [ital T][sub [ital c]] produced by variations in the spin-fluctuation spectral weight. We find that [ital T][sub [ital c]] is increased when spectral weight is shifted to large momentum transfers and frequencies greater than [ital T][sub [ital c]] with an optimal frequency for [ital T][sub [ital c]] enhancement of order 10[ital T][sub [ital c]].

• OSTI ID: 6907806
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:14; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRITICAL TEMPERATURE
CRYSTAL MODELS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FLUCTUATIONS
FUNCTIONS
GREEN FUNCTION
HUBBARD MODEL
MATHEMATICAL MODELS
MOMENTUM TRANSFER
PHYSICAL PROPERTIES
SPIN EXCHANGE
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS
VARIATIONS
WEIGHTING FUNCTIONS