Fractionalization of long-range ordered states in a Falicov-Kimball model

Abstract

A Falicov-Kimball model which thermodynamically reduces the local Coulomb interaction of particles to attraction or repulsion is studied within the dynamical mean-field theory. In the strong interaction regime a fractionalization of particles into charge and spin objects, the physical properties of which are different from the whole particles, is observed in both high- and low-temperature phases. At high temperature and strong interaction the single-particle density of states opens an excitation gap, but the charge compressibility and the spin susceptibility exhibit the features of gapless excitations. The low-temperature phase has a long-range order, and the single-particle spectra are always gapped, while the charge and spin excitations are gapless in the strong interaction regime. In the fractionalized long-range ordered phase both the charge compressibility and the spin susceptibility are universal scaling functions of temperature.

References in corpus (5)

• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Fractionalized Metal in a Falicov-Kimball Model
• $Z_2$ fractionalized phases of a solvable, disordered, $t$-$J$ model
• Mott transitions in the Hubbard model with spatially-modulated interactions
• Mass-imbalance induced metal-insulator transition in a three-component Hubbard model

Cited by in corpus (2)

• Gapless regime in the charge density wave phase of the finite dimensional Falicov-Kimball model
• Orthogonal metal in the Hubbard model with liberated slave spins