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  • Letter
  • Open Access

Electronic correlations and universal long-range scaling in kagome metals

Domenico Di Sante1,2,*, Bongjae Kim3, Werner Hanke4, Tim Wehling5,6, Cesare Franchini1,7, Ronny Thomale4, and Giorgio Sangiovanni4

  • 1Department of Physics and Astronomy, University of Bologna, I-40127 Bologna, Italy
  • 2Center for Computational Quantum Physics, Flatiron Institute, 162 5th Avenue, New York 10010, USA
  • 3Department of Physics, Kunsan University, Gunsan 54150, Republic of Korea
  • 4Institut für Theoretische Physik und Astrophysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, D-97074 Würzburg, Germany
  • 5I. Institute of Theoretical Physics, University of Hamburg, Notkestrasse 9, D-22607 Hamburg, Germany
  • 6The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany
  • 7Faculty of Physics and Center for Computational Materials Science, University of Vienna, Sensengasse 8, A-1090 Vienna, Austria

  • *domenico.disante@unibo.it
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Phys. Rev. Research 5, L012008 – Published 19 January, 2023

DOI: https://doi.org/10.1103/PhysRevResearch.5.L012008

Abstract

We investigate the real-space profile of effective Coulomb interactions in correlated kagome materials. By particularizing to KV3Sb5, Co3Sn2S2, FeSn, and Ni3In, we analyze representative cases that exhibit a large span of correlation-mediated phenomena, and contrast them to prototypical perovskite transition metal oxides. From our constrained random phase approximation studies we find that the on-site interaction strength in kagome metals not only depends on the screening processes at high energy, but also on the low-energy hybridization profile of the electronic density of states. Our results indicate that rescaled by the on-site interaction amplitude, all kagome metals exhibit a universal long-range Coulomb behavior.

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Phys. Rev. Research 5, L012008– Published 19 January, 2023
  • Received 18 March 2022
  • Accepted 10 November 2022
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