eprintid: 10198187
rev_number: 7
eprint_status: archive
userid: 699
dir: disk0/10/19/81/87
datestamp: 2024-10-08 11:01:42
lastmod: 2024-10-08 11:01:42
status_changed: 2024-10-08 11:01:42
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Hu, Huanzhi
creators_name: Krüger, Frank
title: Nature of Topological Phase Transition of Kitaev Quantum Spin Liquids
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
divisions: F64
note: Published by the American Physical Society under the terms of
the Creative Commons Attribution 4.0 International license.
Further distribution of this work must maintain attribution to
the author(s) and the published article’s title, journal citation,
and DOI.
abstract: We investigate the nature of the topological quantum phase transition between the gapless and gapped Kitaev quantum spin liquid phases away from the exactly solvable point. The transition is driven by anisotropy of the Kitaev couplings. At the critical point, the two Dirac points of the gapless Majorana modes merge, resulting in the formation of a semi-Dirac point with quadratic and linear band touching directions. We derive an effective Gross-Neveu-Yukawa-type field theory that describes the topological phase transition in the presence of additional magnetic interactions. We obtain the infrared scaling form of the propagator of the dynamical Ising order parameter field and perform a renormalization-group analysis. The universality of the transition is found to be different from that of symmetry-breaking phase transitions of semi-Dirac electrons. However, as in the electronic case, the Majorana fermions acquire an anomalous dimension, indicative of the breakdown of the fractionalized quasiparticle description.


          
            
            
              
                Published by the American Physical Society
                2024
date: 2024-10-02
date_type: published
publisher: American Physical Society (APS)
official_url: http://dx.doi.org/10.1103/physrevlett.133.146603
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2324956
doi: 10.1103/physrevlett.133.146603
lyricists_name: Hu, Huanzhi
lyricists_name: Kruger, Frank
lyricists_id: HHUAX88
lyricists_id: FKRUG35
actors_name: Kruger, Frank
actors_id: FKRUG35
actors_role: owner
full_text_status: public
publication: Physical Review Letters
volume: 133
number: 14
article_number: 146603
issn: 0031-9007
citation:        Hu, Huanzhi;    Krüger, Frank;      (2024)    Nature of Topological Phase Transition of Kitaev Quantum Spin Liquids.                   Physical Review Letters , 133  (14)    , Article 146603.  10.1103/physrevlett.133.146603 <https://doi.org/10.1103/physrevlett.133.146603>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10198187/1/Kitaev_top.pdf