Absence of long-range superconducting correlations in the frustrated half-filled-band Hubbard model

S. Dayal, R. T. Clay, and S. Mazumdar
Phys. Rev. B 85, 165141 – Published 25 April 2012

Abstract

We present many-body calculations of superconducting pair-pair correlations in the ground state of the half-filled-band Hubbard model on large anisotropic triangular lattices. Our calculations cover nearly the complete range of anisotropies between the square and isotropic triangular lattice limits. We find that the superconducting pair-pair correlations decrease monotonically with increasing on site Hubbard interaction U for interpair distances greater than nearest neighbor. For the large lattices of interest here the distance dependence of the correlations approaches that for noninteracting electrons. Both these results are consistent with the absence of superconductivity in this model in the thermodynamic limit. We conclude that the effective 12-filled band Hubbard model, suggested by many authors to be appropriate for the κ-(BEDT-TTF)-based organic charge-transfer solids, does not explain the superconducting transition in these materials.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 24 January 2012

DOI:https://doi.org/10.1103/PhysRevB.85.165141

©2012 American Physical Society

Authors & Affiliations

S. Dayal1, R. T. Clay1, and S. Mazumdar2

  • 1Department of Physics and Astronomy and HPC2 Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, USA
  • 2Department of Physics, University of Arizona, Tucson, Arizona 85721, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 85, Iss. 16 — 15 April 2012

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×