Hole polaron propagation and pairing in a model for doped CuO/sub 2/

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.4540· OSTI ID:6790726

Choi, H; Mele, E J

We consider a two-dimensional one-band Hubbard Hamiltonian on a square lattice as a model for the doped CuO/sub 2/ layers in the oxide superconductors. In a self-consistent mean-field approximation, doped away from the Neel state at the half-filled band, the elementary charged excitations take the form of spin polarons, i.e., self-localized states produced by a self-consistent polarization of the local staggered magnetization. Spin fluctuations around the equilibrium state mediate a dynamic attractive interaction between these polarons. The resulting pairing potential at the quasihole Fermi surface is found to be most strongly attractive for the d-wave singlet channel. The pairing potential is studied over a range of on-site repulsion U and band fillings, and comparisons are made with several previously reported results in this model.

• Research Organization: University of Pennsylvania, Department of Physics, Philadelphia, Pennsylvania 19104
• OSTI ID: 6790726
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HOLES
INTERACTIONS
LEPTONS
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PAIRING INTERACTIONS
PARTICLE MODELS
POLARONS
QUASI PARTICLES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSPORT THEORY