Magnetic properties of doped GdI2

TL;DR

This paper develops a theoretical model to understand the magnetic phase diagram of doped GdI2, combining first-principles calculations with a phenomenological approach to explore its ground states.

Contribution

It introduces a new model for doped GdI2 that incorporates first-principles data and analyzes the magnetic phases on a triangular lattice.

Findings

Phase diagram of the correlated double exchange model mapped.

Ground state energies for various doping levels calculated.

Insights into magnetic ordering in doped GdI2 provided.

Abstract

Motivated by the recent experimental studies on layered ferromagnetic metallic system GdI2 and its doped variant GdI2Hx we develop a model to understand their ground state magnetic phase diagram. Based on first principle electronic structure calculations we write down a phenomenological model and solve it under certain approximations to obtain the ground state energy. In the process we work out the phase diagram of the correlated double exchange model on a triangular lattice for the specific band structure at hand.