Finite temperature spectral-functions of strongly correlated one-dimensional electron systems

TL;DR

This paper investigates the finite temperature spectral functions of strongly correlated one-dimensional electron systems, revealing temperature-dependent scaling behavior and spectral weight redistribution in tJ models.

Contribution

It introduces a calculation method for spectral functions at finite temperature using spin-charge factorization in tJ models, highlighting temperature effects on spectral properties.

Findings

Scaling behavior is limited below T = J/L.

Spectral weight redistributes in the energy range t.

Finite temperature effects significantly alter spectral functions.

Abstract

The spectral functions of tJ and tJ_{XY} models in the limit of J/t-> 0 and at finite temperatures T>>t are calculated using the spin-charge factorized wave function. We find that the Luttinger-liquid like scaling behavior for a finite system with L sites is restricted below temperatures of the order T = J/L. We also observe weight redistribution in the photoemission spectral function in the energy range t, which is much larger than the temperature.