Altermagnetic Anomalous Hall Effect Emerging from Electronic Correlations

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Toshihiro Sato - , Leibniz Institute for Solid State and Materials Research Dresden, Würzburg-Dresden Cluster of Excellence ct.qmat (Author)
  • Sonia Haddad - , Leibniz Institute for Solid State and Materials Research Dresden, Université de Tunis El Manar, Max-Planck-Institute for the Physics of Complex Systems (Author)
  • Ion Cosma Fulga - , Leibniz Institute for Solid State and Materials Research Dresden, Würzburg-Dresden Cluster of Excellence ct.qmat (Author)
  • Fakher F. Assaad - , Würzburg-Dresden Cluster of Excellence ct.qmat, University of Würzburg (Author)
  • Jeroen Van Den Brink - , Clusters of Excellence ct.qmat: Complexity and Topology in Quantum Matter, Leibniz Institute for Solid State and Materials Research Dresden (Author)

Abstract

While altermagnetic materials are characterized by a vanishing net magnetic moment, their symmetry in principle allows for the existence of an anomalous Hall effect. Here, we introduce a model with altermagnetism in which the emergence of an anomalous Hall effect is driven by interactions. This model is grounded in a modified Kane-Mele framework with antiferromagnetic spin-spin correlations. Quantum Monte Carlo simulations show that the system undergoes a finite temperature phase transition governed by a primary antiferromagnetic order parameter accompanied by a secondary one of Haldane type. The emergence of both orders turns the metallic state of the system, away from half-filling, to an altermagnet with a finite anomalous Hall conductivity. A mean field ansatz corroborates these results, which pave the way into the study of correlation induced altermagnets with finite Berry curvature.

Details

Original languageEnglish
Article number086503
JournalPhysical review letters
Volume133
Issue number8
Publication statusPublished - 23 Aug 2024
Peer-reviewedYes

External IDs

PubMed 39241719

Keywords

ASJC Scopus subject areas