Switchable chiral transport in charge-ordered kagome metal CsV3Sb5

Guo C, Putzke C, Konyzheva S, Huang X, Gutierrez-Amigo M, Errea I, Chen D, Vergniory MG, Felser C, Fischer MH, Neupert T, Moll PJW (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Nature Nature Research

Book Volume: 611

Pages Range: 461-466

Journal Issue: 7936

DOI: 10.1038/s41586-022-05127-9

Abstract

When electric conductors differ from their mirror image, unusual chiral transport coefficients appear that are forbidden in achiral metals, such as a non-linear electric response known as electronic magnetochiral anisotropy (eMChA)1–6. Although chiral transport signatures are allowed by symmetry in many conductors without a centre of inversion, they reach appreciable levels only in rare cases in which an exceptionally strong chiral coupling to the itinerant electrons is present. So far, observations of chiral transport have been limited to materials in which the atomic positions strongly break mirror symmetries. Here, we report chiral transport in the centrosymmetric layered kagome metal CsV3Sb5 observed via second-harmonic generation under an in-plane magnetic field. The eMChA signal becomes significant only at temperatures below T′≈ 35 K, deep within the charge-ordered state of CsV3Sb5 (TCDW ≈ 94 K). This temperature dependence reveals a direct correspondence between electronic chirality, unidirectional charge order7 and spontaneous time-reversal symmetry breaking due to putative orbital loop currents8–10. We show that the chirality is set by the out-of-plane field component and that a transition from left- to right-handed transport can be induced by changing the field sign. CsV3Sb5 is the first material in which strong chiral transport can be controlled and switched by small magnetic field changes, in stark contrast to structurally chiral materials, which is a prerequisite for applications in chiral electronics.

Involved external institutions

École Polytechnique Fédérale de Lausanne (EPFL) CH Switzerland (CH) Max-Planck-Instituts für Struktur und Dynamik der Materie (MPSD) / Max Planck Institute for the Structure and Dynamics of Matter DE Germany (DE) University of Basque Country / Universidad del Pais Vasco (UPV) / Euskal Herriko Unibersitatea (EHU) ES Spain (ES) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Donostia International Physics Center (DIPC) ES Spain (ES) University of Zurich / Universität Zürich (UZH) CH Switzerland (CH)

How to cite

APA:

Guo, C., Putzke, C., Konyzheva, S., Huang, X., Gutierrez-Amigo, M., Errea, I.,... Moll, P.J.W. (2022). Switchable chiral transport in charge-ordered kagome metal CsV3Sb5. Nature, 611(7936), 461-466. https://dx.doi.org/10.1038/s41586-022-05127-9

MLA:

Guo, Chunyu, et al. "Switchable chiral transport in charge-ordered kagome metal CsV3Sb5." Nature 611.7936 (2022): 461-466.

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