Ground-state properties of the two-dimensional Hubbard model

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.7151· OSTI ID:5243080

Lin, H Q ^[1]

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1. Center for Nonlinear Studies, MS-B258, Los Alamos National Laboratory, Los Alamos, New Mexico (USA)

Using all appropriate symmetries for a two-dimensional square system, we have been able to diagonalize exactly the Hubbard Hamiltonian on the 4{times}4 and 18-site lattices. We calculate the ground-state energies, hole-hole interactions, and various correlation functions as functions of the Coulomb repulsion {ital U} and band filling, and compare the Hubbard-model results with those obtained from the {ital t}-{ital J} and strong-coupling models.

• OSTI ID: 5243080
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:13; 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
BAND THEORY
CONFIGURATION
CORRELATION FUNCTIONS
CORRELATIONS
COULOMB FIELD
ELECTRIC FIELDS
ELECTRON CORRELATION
ENERGY LEVELS
FUNCTIONS
GROUND STATES
HAMILTONIAN FUNCTION
HOLES
RECTANGULAR CONFIGURATION
SOLIDS
SQUARE CONFIGURATION