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Article: Caution on Gross-Neveu criticality with a single Dirac cone: Violation of locality and its consequence of unexpected finite-temperature transition

TitleCaution on Gross-Neveu criticality with a single Dirac cone: Violation of locality and its consequence of unexpected finite-temperature transition
Authors
Issue Date2023
Citation
Physical Review B, 2023, v. 108, n. 19, article no. 195112 How to Cite?
AbstractLately there are many SLAC fermion investigations on the (2+1)D Gross-Neveu criticality of a single Dirac cone. While the SLAC fermion construction indeed gives rise to the linear energy-momentum relation for all lattice momenta at the noninteracting limit, the long-range hopping and its consequent violation of locality on the Gross-Neveu quantum critical point (GN-QCP) - which a priori requires short-range interaction - has not been verified. Here we show, by means of large-scale quantum Monte Carlo simulations, that the interaction-driven antiferromagnetic insulator in this case is fundamentally different from that on a purely local π-flux Hubbard model on the square lattice. In particular, the antiferromagnetic long-range order has a finite temperature continuous phase transition, which appears to violate the Mermin-Wagner theorem, and smoothly connects to the previously determined GN-QCP. The magnetic excitations inside the antiferromagnetic insulator are gapped without Goldstone mode, even though the state spontaneously breaks continuous SU(2) symmetry. These unusual results point out the fundamental difference between the QCP in SLAC fermion and that of GN-QCP with short-range interaction.
Persistent Identifierhttp://hdl.handle.net/10722/336956
ISSN
2023 Impact Factor: 3.2
2023 SCImago Journal Rankings: 1.345
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDa Liao, Yuan-
dc.contributor.authorXu, Xiao Yan-
dc.contributor.authorMeng, Zi Yang-
dc.contributor.authorQi, Yang-
dc.date.accessioned2024-02-29T06:57:41Z-
dc.date.available2024-02-29T06:57:41Z-
dc.date.issued2023-
dc.identifier.citationPhysical Review B, 2023, v. 108, n. 19, article no. 195112-
dc.identifier.issn2469-9950-
dc.identifier.urihttp://hdl.handle.net/10722/336956-
dc.description.abstractLately there are many SLAC fermion investigations on the (2+1)D Gross-Neveu criticality of a single Dirac cone. While the SLAC fermion construction indeed gives rise to the linear energy-momentum relation for all lattice momenta at the noninteracting limit, the long-range hopping and its consequent violation of locality on the Gross-Neveu quantum critical point (GN-QCP) - which a priori requires short-range interaction - has not been verified. Here we show, by means of large-scale quantum Monte Carlo simulations, that the interaction-driven antiferromagnetic insulator in this case is fundamentally different from that on a purely local π-flux Hubbard model on the square lattice. In particular, the antiferromagnetic long-range order has a finite temperature continuous phase transition, which appears to violate the Mermin-Wagner theorem, and smoothly connects to the previously determined GN-QCP. The magnetic excitations inside the antiferromagnetic insulator are gapped without Goldstone mode, even though the state spontaneously breaks continuous SU(2) symmetry. These unusual results point out the fundamental difference between the QCP in SLAC fermion and that of GN-QCP with short-range interaction.-
dc.languageeng-
dc.relation.ispartofPhysical Review B-
dc.titleCaution on Gross-Neveu criticality with a single Dirac cone: Violation of locality and its consequence of unexpected finite-temperature transition-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevB.108.195112-
dc.identifier.scopuseid_2-s2.0-85177070434-
dc.identifier.volume108-
dc.identifier.issue19-
dc.identifier.spagearticle no. 195112-
dc.identifier.epagearticle no. 195112-
dc.identifier.eissn2469-9969-
dc.identifier.isiWOS:001101158500001-

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