Thumbnail
Access Restriction
Open

Author Husslein, T. ♦ Morgenstern, I. ♦ Newns, D. M. ♦ Pattnaik, P. C. ♦ Singer, J. M. ♦ Matuttis, H. G.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ HUBBARD MODEL ♦ PAIRING INTERACTIONS ♦ D WAVES ♦ SCALING LAWS ♦ PHASE DIAGRAMS ♦ TRANSITION TEMPERATURE ♦ ELECTRONIC STRUCTURE ♦ FERMI LEVEL ♦ COMPUTERIZED SIMULATION ♦ MONTE CARLO METHOD
Abstract We implement a quantum Monte Carlo calculation for a repulsive Hubbard model with nearest- and next-nearest-neighbor hopping interactions on clusters up to 12{times}12. A parameter region where the Fermi level lies close to the van Hove singularity at the saddle points in the bulk band structure is investigated. A pairing tendency in the {ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}} symmetry channel, but no other channel, is found. Estimates of the effective pairing interaction show that it is close to the value required for a 40 K superconductor. Finite-size scaling compares with the attractive Hubbard model. {copyright}{ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-12-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 22


Open content in new tab

   Open content in new tab