Melting of the stripe phases in the t-t'-U Hubbard model

TL;DR

This paper studies how stripe phases in a two-dimensional Hubbard model melt in the overdoped regime, revealing that spin and charge orders vanish together and exploring mechanisms behind stripe structure stability.

Contribution

It introduces a spin rotation invariant slave boson approach to analyze stripe melting and identifies the simultaneous disappearance of spin and charge order.

Findings

Spin and charge orders disappear simultaneously during stripe melting.

Mechanisms stabilizing bond-centered and site-centered stripe structures are discussed.

The study provides insights into stripe phase behavior in the overdoped regime.

Abstract

We investigate melting of stripe phases in the overdoped regime x>0.3 of the two-dimensional t-t'-U Hubbard model, using a spin rotation invariant form of the slave boson representation. We show that the spin and charge order disappear simultaneously, and discuss a mechanism stabilizing bond-centered and site-centered stripe structures.