Electronic structure and exchange interactions of the ladder vanadates CaV2O5 and MgV2O5

TL;DR

This study uses ab-initio calculations to analyze the electronic structure and magnetic exchange interactions in layered vanadates CaV2O5 and MgV2O5, explaining their differing magnetic properties and spin gaps.

Contribution

It provides the first detailed ab-initio analysis of the electronic and magnetic interactions in CaV2O5 and MgV2O5, clarifying their magnetic behavior.

Findings

CaV2O5 and MgV2O5 have distinct exchange interactions.

The large difference in spin gaps is explained by their electronic structures.

Ab-initio calculations successfully model the magnetic properties.

Abstract

We have performed ab-initio calculations of the electronic structure and exchange couplings in the layered vanadates CaV2O5 and MgV2O5. Based on our results we provide a possible explanation of the unusual magnetic properties of these materials, in particular the large difference in the spin gap between CaV2O5 and MgV2O5.