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

I. Rousochatzakis; S. Kourtis; J. Knolle; R. Moessner; N. B. Perkins

doi:10.1103/PhysRevB.100.045117

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

I. Rousochatzakis
, S. Kourtis
, J. Knolle
, R. Moessner
, N. B. Perkins

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

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.

Original language	English (US)
Article number	045117
Journal	Physical Review B
Volume	100
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.100.045117
State	Published - Jul 12 2019

Bibliographical note

Funding Information:
We thank W. Brenig, K. Burch, M. Daghofer, A. Honecker and X. Zotos for fruitful discussions. I.R. acknowledges the hospitality of the Max Planck Institute for the Physics of Complex Systems (MPI-PKS) of Dresden, where part of this work was done. This work was in part supported by the Deutsche Forschungsgemeinschaft via Grant No. SFB 1143. S.K. was partially supported through the Boston University Center for Non-Equilibrium Systems and Computation. I.R. and N.B.P. were supported by the US Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0018056.

Publisher Copyright:
© 2019 American Physical Society.

Publisher link

10.1103/PhysRevB.100.045117

http://arxiv.org/abs/1811.01671

Find It

Find It at U of M Libraries

Cite this

@article{cb5d675aa67143af831f26a0811738b9,

title = "Quantum spin liquid at finite temperature: Proximate dynamics and persistent typicality",

abstract = "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.",

author = "I. Rousochatzakis and S. Kourtis and J. Knolle and R. Moessner and Perkins, \{N. B.\}",

note = "Funding Information: We thank W. Brenig, K. Burch, M. Daghofer, A. Honecker and X. Zotos for fruitful discussions. I.R. acknowledges the hospitality of the Max Planck Institute for the Physics of Complex Systems (MPI-PKS) of Dresden, where part of this work was done. This work was in part supported by the Deutsche Forschungsgemeinschaft via Grant No. SFB 1143. S.K. was partially supported through the Boston University Center for Non-Equilibrium Systems and Computation. I.R. and N.B.P. were supported by the US Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0018056. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = jul,

day = "12",

doi = "10.1103/PhysRevB.100.045117",

language = "English (US)",

volume = "100",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "4",

}

TY - JOUR

T1 - Quantum spin liquid at finite temperature

T2 - Proximate dynamics and persistent typicality

AU - Rousochatzakis, I.

AU - Kourtis, S.

AU - Knolle, J.

AU - Moessner, R.

AU - Perkins, N. B.

N1 - Funding Information: We thank W. Brenig, K. Burch, M. Daghofer, A. Honecker and X. Zotos for fruitful discussions. I.R. acknowledges the hospitality of the Max Planck Institute for the Physics of Complex Systems (MPI-PKS) of Dresden, where part of this work was done. This work was in part supported by the Deutsche Forschungsgemeinschaft via Grant No. SFB 1143. S.K. was partially supported through the Boston University Center for Non-Equilibrium Systems and Computation. I.R. and N.B.P. were supported by the US Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0018056. Publisher Copyright: © 2019 American Physical Society.

PY - 2019/7/12

Y1 - 2019/7/12

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85070230976

UR - https://www.scopus.com/pages/publications/85070230976#tab=citedBy

U2 - 10.1103/PhysRevB.100.045117

DO - 10.1103/PhysRevB.100.045117

M3 - Article

AN - SCOPUS:85070230976

SN - 2469-9950

VL - 100

JO - Physical Review B

JF - Physical Review B

IS - 4

M1 - 045117

ER -

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

Abstract

Bibliographical note

Publisher link

Find It

Other files and links

Fingerprint

Cite this