Published in

arXiv, 2021

DOI: 10.48550/arxiv.2104.09147

Nature Research, npj 2D Materials and Applications, 1(5), 2021

DOI: 10.1038/s41699-021-00265-6

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Unidirectional Kondo scattering in layered NbS2

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractCrystalline 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.