Anomalous magnetic properties near Mott transition in Kagom\'e lattice Hubbard model

TL;DR

This study explores the unusual magnetic and electronic behaviors in the metallic phase near the Mott transition in a Kagomé lattice Hubbard model, revealing multi-band heavy quasiparticles and anomalous spin correlations.

Contribution

It provides new insights into the properties of quasiparticles and spin correlations near the Mott transition in a geometrically frustrated lattice using cellular dynamical mean field theory.

Findings

Evidence of multi-band heavy quasiparticles in specific heat

Unusual temperature dependence of spin correlation functions

Anomalous properties of quasiparticles near the Mott transition

Abstract

We investigate the characteristics of the metallic phase near the Mott transition in the Kagom\'e lattice Hubbard model using the cellular dynamical mean field theory. By calculating the specific heat and spin correlation functions, we demonstrate that the quasiparticles show anomalous properties in the metallic phase close to the Mott transition. We find clear evidence for the multi-band heavy quasiparticles in the specific heat, which gives rise to unusual temperature dependence of the spin correlation functions.