Effect of hybridization on the magnetic properties of correlated two-band metals

TL;DR

This paper investigates how hybridization influences the magnetic properties of correlated two-band metals using a single site approximation, highlighting conditions for ferromagnetism and drawing parallels with DMFT.

Contribution

It introduces a model combining hybridized bands with electron correlations to analyze magnetic behavior, providing insights into ferromagnetism emergence in such systems.

Findings

Ferromagnetism occurs at specific hybridization and correlation values.

The model shows similarities with Dynamical Mean-Field Theory.

Magnetic properties depend on occupation number and hybridization strength.

Abstract

The magnetic properties of transition-like metals are discussed within the single site approximation, which is a picture to take into account electron correlations. The metal is described by two hybridized bands one of which includes Coulomb correlation. The presented results indicate that ferromagnetism arises for adequate values of hybridization (V), correlation (U) and occupation number($n_{\sigma}$). Some similarities with Dynamical Mean-Field Theory (DMFT) are indicated.