Publication Date

2001

Comments

This is the pre-published version harvested from ArXiv. The published version is located at http://prb.aps.org/abstract/PRB/v64/i3/e033101

Abstract

Worm algorithm Monte Carlo simulations of the hole Green function with subsequent spectral analysis were performed for 0.1<~J/t<~0.4 on lattices with up to L×L=32×32 sites at a temperature as low as T=J/40, and present, apparently, the hole spectral function in the thermodynamic limit. Spectral analysis reveals a δ-function-sharp quasiparticle peak at the lower edge of the spectrum that is incompatible with the power-law singularity and thus rules out the possibility of spin-charge separation in this parameter range. Spectral continuum features two peaks separated by a gap ∼4÷5 t.

Volume

64

Issue

3

Journal Title

Physics Review B



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