Competition between Hidden Spin and Charge Orderings in Stripe Phase

TL;DR

This paper investigates the interplay between hidden spin and charge orderings in stripe phases of hole-doped antiferromagnets using quantum Monte Carlo simulations, revealing a competition influenced by hole mobility.

Contribution

It introduces an effective model of quantum strings in an antiferromagnetic background and directly estimates long-range order parameters to analyze ordering competition.

Findings

Hidden spin order is influenced by hole mobility.

Charge and spin orderings compete as hole mobility increases.

Quantum Monte Carlo effectively estimates long-range order parameters.

Abstract

The correlation between charge and spin orderings in hole-doped antiferromagnets is studied within an effective model of quantum strings fluctuating in an antiferromagnetic background. In particular, we perform the direct estimation of the charge and spin long-range-order parameters by means of the quantum Monte Carlo simulation. A hidden spin long-range order is found to be governed by a competition between the two trends caused by increasing hole mobility: the enhancement of the two-dimensional spin-spin correlation mediated by hole motions and the reformation of a strong stripe order.