Unidirectional Kondo scattering in layered NbS2

Martino, Edoardo; Putzke, Carsten; König, Markus; Moll, Philip J. W.; Berger, Helmuth; LeBoeuf, David; Leroux, Maxime; Proust, Cyril; Akrap, Ana; Kirmse, Holm; Koch, Christoph; Zhang, ShengNan; Wu, QuanSheng; Yazyev, Oleg V.; Forro, Laszlo; Semeniuk, Konstantin

doi:10.1038/s41699-021-00265-6

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Unidirectional Kondo scattering in layered NbS₂

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König, Markus
Markus König, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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引用

Martino, E., Putzke, C., König, M., Moll, P. J. W., Berger, H., LeBoeuf, D., Leroux, M., Proust, C., Akrap, A., Kirmse, H., Koch, C., Zhang, S., Wu, Q., Yazyev, O. V., Forro, L., & Semeniuk, K. (2021). Unidirectional Kondo scattering in layered NbS₂. npj 2D Materials and Applications, 5(1):, pp. 1-7. doi:10.1038/s41699-021-00265-6.

引用: https://hdl.handle.net/21.11116/0000-0009-9F96-B

要旨

Crystalline defects can modify quantum interactions in solids, causing unintuitive, even favourable, properties such as quantum Hall effect or superconducting vortex pinning. Here we present another example of this notion-an unexpected unidirectional Kondo scattering in single crystals of 2H-NbS2. This manifests as a pronounced low-temperature enhancement in the out-of-plane resistivity and thermopower below 40 K, hidden for the in-plane charge transport. The anomaly can be suppressed by the c-axis-oriented magnetic field, but is unaffected by field applied along the planes. The magnetic moments originate from layers of 1T-NbS2, which inevitably form during the growth, undergoing a charge-density-wave reconstruction with each superlattice cell (David-star-shaped cluster of Nb atoms) hosting a localised spin. Our results demonstrate the unique and highly anisotropic response of a spontaneously formed Kondo-lattice heterostructure, intercalated in a layered conductor.