Correlation Induced Vanishing of the Gap Function on the Fermi Surface in High $T_c$ Superconductors

G. Baskaran; D. G. Kanhere; Mihir Arjunwadkar; Rahul Basu

Correlation Induced Vanishing of the Gap Function on the Fermi Surface in High $T_c$ Superconductors

Condensed Matter 2007-05-23 v1

Authors: G. Baskaran , D. G. Kanhere , Mihir Arjunwadkar , Rahul Basu

Abstract

We present physical arguments as well as numerical evidence to show that the Cooper pair (gap) function vanishes on the Fermi surface in strongly correlated electron systems such as \tJ and \lU Hubbard models in one and two dimensions. Using exact diagonalization, we study a correlation function which is a measure of the gap function even in a finite system, and present numerical results for this correlation function on small clusters of 8 (Hubbard) and 16 ( $t-J$ ) sites.

Keywords

correlation effect gap function Fermi surface high-Tc superconductors Hubbard model t-J model exact diagonalization

Cite

@article{arxiv.cond-mat/9403061,
  title  = {Correlation Induced Vanishing of the Gap Function on the Fermi Surface in High $T_c$ Superconductors},
  author = {G. Baskaran and D. G. Kanhere and Mihir Arjunwadkar and Rahul Basu},
  journal= {arXiv preprint arXiv:cond-mat/9403061},
  year   = {2007}
}

Comments

ReVTeX version 3.0, 9 pages, 5 figures as postscript files which can be obtained via anonymous ftp from imsc.ernet.in (144.16.253.1) under the directory /pub/physics. (email: [email protected])

Correlation Induced Vanishing of the Gap Function on the Fermi Surface in High $T_c$ Superconductors

Abstract

Keywords

Cite

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