Spin-charge separation at small lengthscales in the 2D t-J model

TL;DR

This paper investigates spin-charge separation at small lengthscales in the 2D t-J model using projected wavefunctions and structure factors, comparing results with high-temperature expansion data.

Contribution

It introduces analysis of spin-charge separation in the 2D t-J model through various wavefunctions and structure factors, providing new insights into small-scale behavior.

Findings

Evidence of spin-charge separation at small lengthscales

Comparison with high-temperature expansion supports the separation

Analysis of different wavefunctions enhances understanding of the model

Abstract

We consider projected wavefunctions for the 2D $t-J$ model. For various wavefunctions, including correlated Fermi-liquid and Luttinger-type wavefunctions we present the static charge-charge and spin-spin structure factors. Comparison with recent results from a high-temperature expansion by Putikka {\it et al.} indicates spin-charge separation at small lengthscales.