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Single hole spectral function and spin-charge separation in the t-J model

A. Mishchenko·N. V. Prokof'ev·B. V. Svistunov
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Abstract

Worm algorithm quantum Monte Carlo simulations of the hole Green function with subsequent spectral analysis were performed for J/t 0.1, 0.2, 0.4 on lattices with up to LxL=32x32 sites at temperatures as low as T=J/40, and present, apparently, the hole spectral function in the thermodynamic limit. Spectral analysis reveals a delta-function-sharp quasiparticle peak at the lower edge of the spectrum which 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 ~4t.

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A. Mishchenko, N. V. Prokof'ev, B. V. Svistunov. 2001-03-12. Single hole spectral function and spin-charge separation in the t-J model. https://doi.org/10.1103/physrevb.64.033101

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