Journal article

Dynamics of a two-dimensional quantum spin liquid: signatures of emergent majorana fermions and fluxes

Abstract:: We provide a complete and exact theoretical study of the dynamical structure factor of a two-dimensional quantum spin liquid in gapless and gapped phases, as realized in Kitaev’s honeycomb model. We show that there are direct signatures—qualitative and quantitative—of the Majorana fermions and gauge fluxes emerging in this model. These include counterintuitive manifestations of quantum number fractionalization, such as a neutron scattering response with a gap even in the presence of gapless excitations, and a sharp component despite the fractionalization of electron spin. Our analysis identifies new varieties of the venerable x-ray edge problem and explores connections to the physics of quantum quenches.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Knolle, J., Kovrizhin, D., Chalker, J., & Moessner, R. (2014). Dynamics of a two-dimensional quantum spin liquid: signatures of emergent majorana fermions and fluxes. Physical Review Letters, 112(20), 207203.

MLA Style

Knolle, J., et al. “Dynamics of a Two-Dimensional Quantum Spin Liquid: Signatures of Emergent Majorana Fermions and Fluxes.” Physical Review Letters, vol. 112, no. 20, American Physical Society, 2014, p. 207203.

Chicago Style

Knolle, J, D Kovrizhin, J Chalker, and R Moessner. 2014. “Dynamics of a Two-Dimensional Quantum Spin Liquid: Signatures of Emergent Majorana Fermions and Fluxes.” Physical Review Letters 112 (20): 207203.
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Files:: PhysRevLett.112.207203.pdf

(Preview, Version of record, pdf, 431.8KB, Terms of use)

Publisher copy:: 10.1103/PhysRevLett.112.207203

Authors

+ Knolle, J More by this author

Role:: Author

+ Kovrizhin, D More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Sub department:: Atomic & Laser Physics
Role:: Author

+ Chalker, J More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Sub department:: Theoretical Physics
Oxford college:: St Hugh's College
Role:: Author

+ Moessner, R More by this author

Role:: Author

+ More from this funder

Grant:: EP/I032487/1; EP/J017639/1; EP/J009636/1

+ Engineering & Physical Sciences Research Council More from this funder

Grant:: EP/I032487/1

+ Engineering and Physical Sciences Research Council More from this funder

Publisher:: American Physical Society
Journal:: Physical Review Letters More from this journal
Volume:: 112
Issue:: 20
Pages:: 207203
Publication date:: 2014-05-21
Acceptance date:: 2014-03-26
DOI:: 10.1103/PhysRevLett.112.207203
EISSN:: 1079-7114
ISSN:: 0031-9007

Keywords:: cond-mat.str-el

cond-mat.supr-con

SBTMR
Pubs id:: pubs:418284
UUID:: uuid:923f7396-d2c8-4f41-8090-7d88b18a1d04
Local pid:: pubs:418284
Source identifiers:: 418284
Deposit date:: 2018-04-21

Terms of use

Copyright holder:: American Physical Society
Copyright date:: 2014
Notes:: © 2014 American Physical Society

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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