Thermally-induced magnetic phases in an Ising spin Kondo lattice model on a kagome lattice at 1/3-filling

TL;DR

This study uses Monte Carlo simulations to explore thermally-induced magnetic phases in an Ising spin Kondo lattice model on a kagome lattice at 1/3-filling, revealing complex phase transitions including a Kosterlitz-Thouless-like phase and a partially disordered state.

Contribution

It provides the first detailed numerical analysis of magnetic phase transitions in this specific kagome lattice Kondo model at 1/3-filling, highlighting novel intermediate phases.

Findings

Identification of a Kosterlitz-Thouless-like phase at intermediate temperatures.

Discovery of a partially disordered phase with antiferromagnetic hexagons.

Comparison of magnetic phases between kagome and triangular lattices.

Abstract

Numerical investigation on the thermodynamic properties of an Ising spin Kondo lattice model on a kagome lattice is reported. By using Monte Carlo simulation, we investigated the magnetic phases at 1/3-filling. We identified two successive transitions from high-temperature paramagnetic state to a Kosterlitz-Thouless-like phase in an intermediate temperature range and to a partially disordered phase at a lower temperature. The partially disordered state is characterized by coexistence of antiferromagnetic hexagons and paramagnetic sites with period $\sqrt3 \times \sqrt3$. We compare the results with those for the triangular lattice case.