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Condensed Matter > Strongly Correlated Electrons
Title: Fractons from a liquid of singlet pairs
(Submitted on 21 Dec 2020 (v1), last revised 25 Jan 2021 (this version, v2))
Abstract: Fracton phases of matter feature a variety of exciting phenomena stemming from the restricted mobility of their quasiparticles. Here we consider a model of interacting electrons in one dimension that describes hopping of spin-singlet pairs and obeys both charge and dipole conservation laws. The model contains Bethe ansatz integrable sectors which allow us to solve the ground state and calculate the exact spin and single-electron excitation gaps. We observe hallmarks of fractonic behavior, including localization of single-electron excitations and propensity to clustering. Our results demonstrate the important role of the dipole moment conservation law in a simple model of spin-1/2 fermions.
Submission history
From: Hernán Xavier [view email][v1] Mon, 21 Dec 2020 22:10:40 GMT (198kb,D)
[v2] Mon, 25 Jan 2021 20:31:09 GMT (204kb,D)
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