A New Phase Diagram for the t-J Model

TL;DR

This paper introduces a new phase diagram for the t-J model, revealing broad phase coexistence regions and discussing phase separation phenomena at zero and finite temperatures.

Contribution

It presents a novel phase diagram for the t-J model that incorporates phase coexistence and discusses phase separation techniques, advancing understanding of nonmagnetic phases.

Findings

Broad phase coexistence regions identified

Phase separation into hole-rich and hole-poor regions supported

New insights into nonmagnetic phases at various temperatures

Abstract

We study the so-called nonmagnetic phases (dimer and flux states) in the t-J model below half filling. We present a new phase diagram, at zero and finite temperature, that includes broad areas of phase coexistence (dimer-flux or flux-uniform), in accordance with experimental and numerical data on the possibility of separation into hole-rich and hole-poor regions. We also briefly comment on some techniques used in the literature to discuss phase separation in the t-J model.