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Phenomenology of bond and flux orders in kagome metals


Wagner, Glenn; Guo, Chunyu; Moll, Philip J W; Neupert, Titus; Fischer, Mark H (2023). Phenomenology of bond and flux orders in kagome metals. Physical review B, 108(12):125136.

Abstract

Despite much experimental and theoretical work, the nature of the charge order in the kagome metals belonging to the family of materials AV3Sb5 (A=Cs,Rb,K) remains controversial. A crucial ingredient for the identification of the ordering in these materials is their response to external perturbations, such as strain or magnetic fields. To this end, we provide a comprehensive symmetry classification of the possible charge orders in kagome materials with a 2×2 increase of the unit cell. Motivated by the experimental reports of time-reversal symmetry breaking and rotational anisotropy, we consider the interdependence of flux and bond orders. Deriving the relevant Landau free energy for possible orders, we study the effect of symmetry-breaking perturbations such as strain and magnetic fields. Our results thus provide a road map for future tests of these intricate orders.

Abstract

Despite much experimental and theoretical work, the nature of the charge order in the kagome metals belonging to the family of materials AV3Sb5 (A=Cs,Rb,K) remains controversial. A crucial ingredient for the identification of the ordering in these materials is their response to external perturbations, such as strain or magnetic fields. To this end, we provide a comprehensive symmetry classification of the possible charge orders in kagome materials with a 2×2 increase of the unit cell. Motivated by the experimental reports of time-reversal symmetry breaking and rotational anisotropy, we consider the interdependence of flux and bond orders. Deriving the relevant Landau free energy for possible orders, we study the effect of symmetry-breaking perturbations such as strain and magnetic fields. Our results thus provide a road map for future tests of these intricate orders.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Electronic, Optical and Magnetic Materials
Physical Sciences > Condensed Matter Physics
Language:English
Date:21 September 2023
Deposited On:11 Dec 2023 13:47
Last Modified:27 Jun 2024 03:39
Publisher:American Physical Society
ISSN:2469-9950
OA Status:Closed
Publisher DOI:https://doi.org/10.1103/physrevb.108.125136
Project Information:
  • : FunderEuropean Research Council
  • : Grant ID
  • : Project Title
  • : FunderH2020
  • : Grant ID715730
  • : Project TitleMiTopMat - Microstructured Topological Materials: A novel route towards topological electronics