Long-range electron coherence in Kagome metals
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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909584181952512 |
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| author | Chunyu Guo Wang, Kaize Zhang, Ling Putzke, Carsten Chen, Dong van Delft, Maarten R. Wiedmann, Steffen Balakirev, Fedor F. McDonald, Ross D. Gutierrez-Amigo, Martin Alkorta, Manex Errea, Ion Vergniory, Maia G. Oka, Takashi Moessner, Roderich Fischer, Mark H. Neupert, Titus Felser, Claudia Moll, Philip J. W. |
| author_facet | Chunyu Guo Wang, Kaize Zhang, Ling Putzke, Carsten Chen, Dong van Delft, Maarten R. Wiedmann, Steffen Balakirev, Fedor F. McDonald, Ross D. Gutierrez-Amigo, Martin Alkorta, Manex Errea, Ion Vergniory, Maia G. Oka, Takashi Moessner, Roderich Fischer, Mark H. Neupert, Titus Felser, Claudia Moll, Philip J. W. |
| contents | The wave-like nature of electrons lies at the core of quantum mechanics, distinguishing them from classical particles. Landmark experiments have revealed phase coherence of mobile electrons within solids, such as Aharonov-Bohm interference in mesoscopic rings. However, this coherence is typically limited by numerous environmental interactions. Controlling and ideally mitigating such decoherence remains a central challenge in condensed matter physics. Here, we report magnetoresistance oscillations in mesoscopic pillars of the Kagome metal CsV$_3$Sb$_5$ for fields applied parallel to the Kagome planes. Their periodicity is independent of materials parameters, simply given by the number of flux quanta $h/e$ threading between adjacent Kagome layers akin to an atomic-scale Aharonov-Bohm interferometer. Intriguingly they occur under conditions not favorable for typical interference in solids, at temperatures above 20 K and in micrometer-scale devices well exceeding the single-particle mean free path. Further, the oscillations exhibit non-analytic field-angle dependence and scale consistently with a broad range of key electronic responses in CsV$_3$Sb$_5$, pointing to a cooperative mechanism that establishes intrinsic coherence. Our findings provide new insights into the debated origin of correlated order in CsV$_3$Sb$_5$ and establish Kagome metals as a promising platform for interaction-stabilized long-range electron coherence - crucial for both fundamental studies and technological advancements in quantum interference in metallic systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_13564 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Long-range electron coherence in Kagome metals Chunyu Guo Wang, Kaize Zhang, Ling Putzke, Carsten Chen, Dong van Delft, Maarten R. Wiedmann, Steffen Balakirev, Fedor F. McDonald, Ross D. Gutierrez-Amigo, Martin Alkorta, Manex Errea, Ion Vergniory, Maia G. Oka, Takashi Moessner, Roderich Fischer, Mark H. Neupert, Titus Felser, Claudia Moll, Philip J. W. Strongly Correlated Electrons Materials Science Superconductivity The wave-like nature of electrons lies at the core of quantum mechanics, distinguishing them from classical particles. Landmark experiments have revealed phase coherence of mobile electrons within solids, such as Aharonov-Bohm interference in mesoscopic rings. However, this coherence is typically limited by numerous environmental interactions. Controlling and ideally mitigating such decoherence remains a central challenge in condensed matter physics. Here, we report magnetoresistance oscillations in mesoscopic pillars of the Kagome metal CsV$_3$Sb$_5$ for fields applied parallel to the Kagome planes. Their periodicity is independent of materials parameters, simply given by the number of flux quanta $h/e$ threading between adjacent Kagome layers akin to an atomic-scale Aharonov-Bohm interferometer. Intriguingly they occur under conditions not favorable for typical interference in solids, at temperatures above 20 K and in micrometer-scale devices well exceeding the single-particle mean free path. Further, the oscillations exhibit non-analytic field-angle dependence and scale consistently with a broad range of key electronic responses in CsV$_3$Sb$_5$, pointing to a cooperative mechanism that establishes intrinsic coherence. Our findings provide new insights into the debated origin of correlated order in CsV$_3$Sb$_5$ and establish Kagome metals as a promising platform for interaction-stabilized long-range electron coherence - crucial for both fundamental studies and technological advancements in quantum interference in metallic systems. |
| title | Long-range electron coherence in Kagome metals |
| topic | Strongly Correlated Electrons Materials Science Superconductivity |
| url | https://arxiv.org/abs/2504.13564 |