Interface ordering and phase competition in a model Mott-insulator--band-insulator heterostructure

TL;DR

This paper investigates the phase diagram of Mott-insulator--band-insulator heterostructures, revealing an interface-stabilized ferromagnetic phase and its competition with antiferromagnetic order using advanced theoretical methods.

Contribution

It introduces a detailed analysis of phase competition and coexistence in heterostructures using the semiclassical dynamical-mean-field approximation.

Findings

Discovery of an interface-stabilized ferromagnetic phase.

Observation of competition between ferromagnetic and antiferromagnetic orders.

Dependence of phases on thickness, coupling, and charge confinement.

Abstract

The phase diagram of model Mott-insulator--band-insulator heterostructures is studied using the semiclassical approximation to the dynamical-mean-field method as a function of thickness, coupling constant, and charge confinement. An interface-stabilized ferromagnetic phase is found, allow the study of its competition and possible coexistence with the antiferromagnetic order characteristic of the bulk Mott insulator.