Segmented Band Mechanism for Itinerant Ferromagnetism

TL;DR

This paper proposes a new mechanism for itinerant ferromagnetism based on a two-band model, demonstrating its presence in the Periodic Anderson Model and its relevance to certain electron compounds.

Contribution

It introduces a novel ferromagnetism mechanism not relying on intra-atomic Hund's coupling, applicable to the Periodic Anderson Model and specific electron materials.

Findings

The mechanism is demonstrated in the Periodic Anderson Model.

It does not require intra-atomic Hund's coupling.

Applicable to iron group and some f-electron compounds.

Abstract

We introduce a novel mechanism for itinerant ferromagnetism, which is based on a simple two-band model, and using numerical and analytical methods, we show that the Periodic Anderson Model (PAM) contains this mechanism. We propose that the mechanism, which does not assume an intra-atomic Hund's coupling, is present in both the iron group and some $f$ electron compounds.