1811.01671v1.pdf (4.63 MB)
Download file

Quantum spin liquid at finite temperature: Proximate dynamics and persistent typicality

Download (4.63 MB)
journal contribution
posted on 15.07.2019, 09:26 authored by Ioannis RousochatzakisIoannis Rousochatzakis, S. Kourtis, J. Knolle, R. Moessner, Natalia B. Perkins
Quantum spin liquids are long-range entangled states of matter with emergent gauge fields and fractionalized excitations. While candidate materials, such as the Kitaev honeycomb ruthenate α-RuCl3, show magnetic order at low temperatures T , here we demonstrate numerically a dynamical crossover from magnonlike behavior at low T and frequencies ω to long-lived fractionalized fermionic quasiparticles at higher T and ω. This crossover is akin to the presence of spinon continua in quasi-1D spin chains. It is further shown to go hand in hand with persistent typicality down to very low T . This aspect, which has also been observed in the spin-1/2 kagome Heisenberg antiferromagnet, is a signature of proximate spin liquidity and emergent gauge degrees of freedom more generally, and can be the basis for the numerical study of many finite-T properties of putative spin liquids.

Funding

Deutsche Forschungsgemeinschaft via grant SFB 1143. Boston University Center for Non-Equilibrium Systems and Computation. U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award #DE- SC0018056.

History

School

  • Science

Department

  • Physics

Published in

Physical Review B

Volume

100

Issue

4

Citation

ROUSOCHATZAKIS, I. ... et al, 2019. Quantum spin liquid at finite temperature: Proximate dynamics and persistent typicality. Physical Review B, 100 (4), 045117.

Publisher

© American Physical Society (APS)

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

01/07/2019

Publication date

2019-07-12

Notes

This paper was accepted for publication in the journal Physical Review B and the definitive published version is available at https://doi.org/10.1103/PhysRevB.100.045117.

ISSN

2469-9950

eISSN

2469-9969

Language

en

Usage metrics

Keywords

Exports