Two-hole [ital d]-wave binding in the physical region of the [ital t]-[ital J] model: A Green's-function Monte Carlo study

Journal Article · Sat May 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.11897· OSTI ID:6604346

Boninsegni, M; Manousakis, E ^[1]

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1. Department of Physics, Center for Materials Research and Technology, Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306 (United States)

We investigate numerically the ground state of two holes with [ital d][sub [ital x]][sup 2][minus][ital y][sup 2] symmetry in the two-dimensional [ital t]-[ital J] model, on lattices of significantly larger sizes than the ones studied so far. The Green's-function Monte Carlo method, in conjunction with suitable initial states and guidance functions, is used to estimate the ground-state energy of one and two holes, as well as to compute the two-hole distribution function. Our results show a significant decrease of the two-hole binding energy as the size of the lattice is increased from 4[times]4. A critical value [ital J][sub [ital c]][similar to]0.27[ital t] is found such that [ital d]-wave hole binding no longer occurs for [ital J][lt][ital J][sub [ital c]].

• DOE Contract Number: FC05-85ER25000
• OSTI ID: 6604346
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:18; 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
BINDING ENERGY
CALCULATION METHODS
COMPUTERIZED SIMULATION
CRITICAL CURRENT
CURRENTS
DISTRIBUTION FUNCTIONS
ELECTRIC CURRENTS
ENERGY
ENERGY LEVELS
FUNCTIONS
GREEN FUNCTION
GROUND STATES
HIGH-TC SUPERCONDUCTORS
HOLES
INTERACTIONS
MONTE CARLO METHOD
PAIRING INTERACTIONS
SIMULATION
SUPERCONDUCTORS
TWO-DIMENSIONAL CALCULATIONS