Magnetic correlations in the Hubbard model on triangular and Kagome lattices

TL;DR

This paper investigates magnetic properties of the Hubbard model on triangular and Kagome lattices using Quantum Monte Carlo, revealing how lattice structure influences magnetic fluctuations and highlighting potential for superconductivity in doped Kagome systems.

Contribution

It provides new Quantum Monte Carlo data on magnetic susceptibility in frustrated lattices, emphasizing the role of lattice structure in magnetic behavior and superconductivity potential.

Findings

Lattice structure determines magnetic fluctuation nature and doping dependence.

Doped Kagome exhibits strong short-range magnetic correlations.

Metallic Kagome systems are promising for superconductivity studies.

Abstract

In order to study the magnetic properties of frustrated metallic systems, we present Quantum Monte Carlo data on the magnetic susceptibility of the Hubbard model on triangular and Kagome lattices. We show that the underlying lattice structure is important, and determines the nature and the doping dependence of the magnetic fluctuations. In particular, in the doped Kagome case we find strong short-range magnetic correlations, which makes the metallic Kagome systems a promising field for studies of superconductivity.