Phase diagram of the two-dimensional negative-U Hubbard model

Journal Article · Mon Mar 20 04:00:00 EST 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.62.1407· OSTI ID:6184394

Scalettar, R T; Loh, E Y; Gubernatis, J E; Moreo, A; White, S R; Scalapino, D J; Sugar, R L; Dagotto, E

Theoretical arguments and numerical calculations are used to discuss the phase diagram of the two-dimensional negative-U Hubbard model. Our results are consistent with (1) a vanishing transition temperature at half-filling but with a ground state having both superconducting and charge-density-wave long-range order, and (2) a Kosterlitz-Thouless transition at a finite temperature into a superconducting state with power-law decay of the pairing correlations away from half-filling.

• Research Organization: Department of Physics, University of Illinois, Urbana, Illinois 61801
• OSTI ID: 6184394
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 62:12; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

656000* -- Condensed Matter Physics
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BCS THEORY
CORRELATIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON CORRELATION
ELECTRON PAIRS
MAGNETIC PROPERTIES
NUMERICAL SOLUTION
ORDER-DISORDER TRANSFORMATIONS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLASMA WAVES
SOLIDS
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS