Quasiparticles with fractional charges in fractionally filled systems

TL;DR

This paper introduces a new class of quasiparticles called fractyons with fractional charges in systems with discrete symmetry degeneracies, specifically in fractionally filled lattice systems, and explores their properties.

Contribution

It presents the theoretical prediction of fractyons, a novel type of quasiparticles with fractional charges arising from lattice degeneracies in fractionally filled systems.

Findings

Identification of fractyons as fractional charge quasiparticles

Analysis of static properties of fractyons

Discussion of dynamic behaviors of fractyons

Abstract

We study systems that approach a state possessing discrete symmetry due to different degenerate realizations for the system. For concreteness, we consider fractionally filled systems where degeneracy comes from the presence of identical sub-lattices. We show that such systems possess a new type of quasiparticles with fractional charges, which we refer to as fractyons. We discuss static and dynamic properties of these quasiparticles.