Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe
Abstract The intrinsic frustrated nature of a kagome lattice is amenable to the realization of exotic phases of matter, such as quantum spin liquids or spin ices, and the multiple-q charge density waves (CDW) in the kagome metals. Despite intense efforts to understand the mechanism driving the elect...
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Nature Portfolio
2025-05-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-58725-2 |
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| author | D. Subires A. Kar A. Korshunov C. A. Fuller Yi Jiang H. Hu D. Călugăru C. McMonagle C. Yi S. Roychowdhury W. Schnelle C. Shekhar J. Strempfer A. Jana I. Vobornik J. Dai M. Tallarida D. Chernyshov A. Bosak C. Felser B. Andrei Bernevig S. Blanco-Canosa |
| author_facet | D. Subires A. Kar A. Korshunov C. A. Fuller Yi Jiang H. Hu D. Călugăru C. McMonagle C. Yi S. Roychowdhury W. Schnelle C. Shekhar J. Strempfer A. Jana I. Vobornik J. Dai M. Tallarida D. Chernyshov A. Bosak C. Felser B. Andrei Bernevig S. Blanco-Canosa |
| author_sort | D. Subires |
| collection | DOAJ |
| description | Abstract The intrinsic frustrated nature of a kagome lattice is amenable to the realization of exotic phases of matter, such as quantum spin liquids or spin ices, and the multiple-q charge density waves (CDW) in the kagome metals. Despite intense efforts to understand the mechanism driving the electronic modulations, its origin is still unknown and obscured by competing interactions and intertwined orders. Here, we identify a dimerization-driven 2D hexagonal charge-diffuse precursor in the antiferromagnetic kagome metal FeGe and demonstrate that the fraction of dimerized/undimerized states is the relevant order parameter of the multiple-q CDW of a continuous phase transition. The pretransitional charge fluctuations with propagation vector q = q M at TCDW < T < T*(125 K) are anisotropic, hence holding a quasi-long-range bond-orientational order. The broken translational symmetry emerges from the anisotropic diffuse precursor, akin to the Ising scenario of antiferromagnetic triangular lattices. The temperature and momentum dependence of the critical scattering show parallels to the stacked hexatic B-phases reported in liquid crystals and transient states of CDWs and highlight the key role of the topological defect-mediated melting of the CDW in FeGe. |
| format | Article |
| id | doaj-art-d4da01b9b0cb4bbea4ac3ab81588457f |
| institution | OA Journals |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-d4da01b9b0cb4bbea4ac3ab81588457f2025-08-20T01:53:19ZengNature PortfolioNature Communications2041-17232025-05-0116111110.1038/s41467-025-58725-2Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGeD. Subires0A. Kar1A. Korshunov2C. A. Fuller3Yi Jiang4H. Hu5D. Călugăru6C. McMonagle7C. Yi8S. Roychowdhury9W. Schnelle10C. Shekhar11J. Strempfer12A. Jana13I. Vobornik14J. Dai15M. Tallarida16D. Chernyshov17A. Bosak18C. Felser19B. Andrei Bernevig20S. Blanco-Canosa21Donostia International Physics Center (DIPC), Paseo Manuel de LardizábalDonostia International Physics Center (DIPC), Paseo Manuel de LardizábalDonostia International Physics Center (DIPC), Paseo Manuel de LardizábalSwiss-Norwegian Beamlines at European Synchrotron Radiation FacilityDonostia International Physics Center (DIPC), Paseo Manuel de LardizábalDonostia International Physics Center (DIPC), Paseo Manuel de LardizábalDepartment of Physics, Princeton UniversitySwiss-Norwegian Beamlines at European Synchrotron Radiation FacilityMax Planck Institute for Chemical Physics of SolidsMax Planck Institute for Chemical Physics of SolidsMax Planck Institute for Chemical Physics of SolidsMax Planck Institute for Chemical Physics of SolidsAdvanced Photon Source, Argonne National LaboratoryCNR-Istituto Officina dei Materiali (CNR-IOM)CNR-Istituto Officina dei Materiali (CNR-IOM)ALBA Synchrotron Light SourceALBA Synchrotron Light SourceSwiss-Norwegian Beamlines at European Synchrotron Radiation FacilityEuropean Synchrotron Radiation Facility (ESRF)Max Planck Institute for Chemical Physics of SolidsDonostia International Physics Center (DIPC), Paseo Manuel de LardizábalDonostia International Physics Center (DIPC), Paseo Manuel de LardizábalAbstract The intrinsic frustrated nature of a kagome lattice is amenable to the realization of exotic phases of matter, such as quantum spin liquids or spin ices, and the multiple-q charge density waves (CDW) in the kagome metals. Despite intense efforts to understand the mechanism driving the electronic modulations, its origin is still unknown and obscured by competing interactions and intertwined orders. Here, we identify a dimerization-driven 2D hexagonal charge-diffuse precursor in the antiferromagnetic kagome metal FeGe and demonstrate that the fraction of dimerized/undimerized states is the relevant order parameter of the multiple-q CDW of a continuous phase transition. The pretransitional charge fluctuations with propagation vector q = q M at TCDW < T < T*(125 K) are anisotropic, hence holding a quasi-long-range bond-orientational order. The broken translational symmetry emerges from the anisotropic diffuse precursor, akin to the Ising scenario of antiferromagnetic triangular lattices. The temperature and momentum dependence of the critical scattering show parallels to the stacked hexatic B-phases reported in liquid crystals and transient states of CDWs and highlight the key role of the topological defect-mediated melting of the CDW in FeGe.https://doi.org/10.1038/s41467-025-58725-2 |
| spellingShingle | D. Subires A. Kar A. Korshunov C. A. Fuller Yi Jiang H. Hu D. Călugăru C. McMonagle C. Yi S. Roychowdhury W. Schnelle C. Shekhar J. Strempfer A. Jana I. Vobornik J. Dai M. Tallarida D. Chernyshov A. Bosak C. Felser B. Andrei Bernevig S. Blanco-Canosa Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe Nature Communications |
| title | Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe |
| title_full | Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe |
| title_fullStr | Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe |
| title_full_unstemmed | Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe |
| title_short | Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe |
| title_sort | frustrated charge density wave and quasi long range bond orientational order in the magnetic kagome fege |
| url | https://doi.org/10.1038/s41467-025-58725-2 |
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