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27 April 2024

» arxiv » cond-mat/9811328

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Exact Density of States in a System of Disordered Two Dimensional Dirac Fermions in the Unitarity Limit: The d-wave Superconductor
Catherine Pepin ; Patrick A. Lee ;
Date:	23 Nov 1998
Subject:	Strongly Correlated Electrons; Disordered Systems and Neural Networks; Superconductivity \| cond-mat.str-el cond-mat.dis-nn cond-mat.supr-con
Abstract:	In this paper we present a method to compute the exact density of states induced by $N$ non magnetic impurities in a system of two dimensional Dirac fermions in the unitarity limit. We review the case of the $pi$-flux phase of the Heisenberg model and also treat the disordered d-wave superconductor. In both case we find additional states in the gap with $delta ho (omega) simeq n_i/ \|omega(ln^2 \|omega/Delta_0\| + (pi/2)^2)\|$.
Source:	arXiv, cond-mat/9811328
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