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DOE OSTI · 3020434

Many-body interference in kagome crystals

Guo, Chunyu [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)] (ORCID:0000000183397477)·Wang, Kaize [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)]·Zhang, Ling [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)] (ORCID:0000000309356372)·Putzke, Carsten [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)]·Chen, Dong [Qingdao Univ. (China); Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)] (ORCID:0000000271709725)·van Delft, Maarten R. [Radboud Univ., Nijmegen (Netherlands)]·Wiedmann, Steffen [Radboud Univ., Nijmegen (Netherlands)]·Balakirev, Fedor Fedorovich [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). National High Magnetic Field Laboratory (MagLab)] (ORCID:0000000348875140)·McDonald, Ross David [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). National High Magnetic Field Laboratory (MagLab)] (ORCID:0000000258194739)·Gutierrez-Amigo, Martin [Aalto Univ. (Finland)] (ORCID:0000000252651441)·Alkorta, Manex [Centro de Fisica de Materials (CSIC-UPV/EHU), San Sebastian (Spain); Univ. of the Basque Country (UPV/EHU), San Sebastian (Spain)] (ORCID:0009000381099216)·Errea, Ion [Centro de Fisica de Materials (CSIC-UPV/EHU), San Sebastian (Spain); Univ. of the Basque Country (UPV/EHU), San Sebastian (Spain); Donostia International Physics Center (DIPC), San Sebastian (Spain)] (ORCID:0000000257196580)·Vergniory, Maia G. [Donostia International Physics Center (DIPC), San Sebastian (Spain); Univ. of Sherbrooke, QC (Canada)] (ORCID:0000000173363062)·Oka, Takashi [Univ. of Tokyo (Japan)]·Moessner, Roderich [Max Planck Society, Dresden (Germany). Max Planck Institute for the Physics of Complex Systems]·Fischer, Mark H. [Univ. of Zurich (Switzerland)] (ORCID:0000000308106064)·Neupert, Titus [Univ. of Zurich (Switzerland)] (ORCID:000000030604041X)·Felser, Claudia [Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)] (ORCID:0000000282002063)·Moll, Philip J. W. [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)] (ORCID:0000000276165886)
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Abstract

When electrons in metals act collectively, they enable emergent phenomena and electronic functionalities that transcend the behaviour of individual particles. Coherent collective charge motion has so far been observed primarily in superconductors, in which it arises with the formation of Cooper pairs. Here we report experimental evidence for coherent charge transport in the normal state of the kagome metal CsV 3 Sb 5 , indicative of a distinct collective electronic state. The signature is a set of magnetoresistance oscillations in mesoscopic crystalline pillars under in-plane magnetic fields, with a periodicity determined by the number of magnetic flux quanta h/e threading between adjacent kagome layers—effectively forming an interlayer Aharonov–Bohm interferometer. The cooperative nature of this phenomenon is evidenced by a non-analytic angular dependence characterized by abrupt transitions between discrete oscillation frequencies and its persistence over length scales that exceed the single-particle mean free path. Notably, the oscillation amplitude matches other anomalous electronic responses reported in CsV 3 Sb 5 , pointing to an underlying mechanism that establishes intrinsic coherence. These findings shed new light on the debated nature of correlated order in kagome metals and establish CsV 3 Sb 5 as a platform for realizing long-range coherent charge transport in the absence of superconductivity—opening new directions for coherence in correlated electron systems beyond conventional models.

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Guo, Chunyu [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)] (ORCID:0000000183397477), Wang, Kaize [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)], Zhang, Ling [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)] (ORCID:0000000309356372), Putzke, Carsten [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)], Chen, Dong [Qingdao Univ. (China); Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)] (ORCID:0000000271709725), van Delft, Maarten R. [Radboud Univ., Nijmegen (Netherlands)], Wiedmann, Steffen [Radboud Univ., Nijmegen (Netherlands)], Balakirev, Fedor Fedorovich [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). National High Magnetic Field Laboratory (MagLab)] (ORCID:0000000348875140), McDonald, Ross David [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). National High Magnetic Field Laboratory (MagLab)] (ORCID:0000000258194739), Gutierrez-Amigo, Martin [Aalto Univ. (Finland)] (ORCID:0000000252651441), Alkorta, Manex [Centro de Fisica de Materials (CSIC-UPV/EHU), San Sebastian (Spain); Univ. of the Basque Country (UPV/EHU), San Sebastian (Spain)] (ORCID:0009000381099216), Errea, Ion [Centro de Fisica de Materials (CSIC-UPV/EHU), San Sebastian (Spain); Univ. of the Basque Country (UPV/EHU), San Sebastian (Spain); Donostia International Physics Center (DIPC), San Sebastian (Spain)] (ORCID:0000000257196580), Vergniory, Maia G. [Donostia International Physics Center (DIPC), San Sebastian (Spain); Univ. of Sherbrooke, QC (Canada)] (ORCID:0000000173363062), Oka, Takashi [Univ. of Tokyo (Japan)], Moessner, Roderich [Max Planck Society, Dresden (Germany). Max Planck Institute for the Physics of Complex Systems], Fischer, Mark H. [Univ. of Zurich (Switzerland)] (ORCID:0000000308106064), Neupert, Titus [Univ. of Zurich (Switzerland)] (ORCID:000000030604041X), Felser, Claudia [Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)] (ORCID:0000000282002063), Moll, Philip J. W. [Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)] (ORCID:0000000276165886). 2025-10-29. Many-body interference in kagome crystals. https://doi.org/10.1038/s41586-025-09659-8

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