Unidirectional Kondo scattering in layered NbS2

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-NbS 2 ....

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Published in:NPJ 2D materials and applications 2021-11, Vol.5 (1), p.1-7, Article 86
Main Authors: 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., Forró, László, Semeniuk, Konstantin
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Language:English
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639/766/119/1002
639/766/119/2792/4129
639/766/119/995
Charge density waves
Charge transport
Chemistry and Materials Science
Condensed Matter
Conductors
Crystal defects
Crystals
Heterostructures
Kondo effect
Low temperature
Magnetic moments
Materials Science
Nanotechnology
Physics
Quantum Hall effect
Scattering
Single crystals
Strongly Correlated Electrons
Superlattices
Surfaces and Interfaces
Thin Films
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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.
Forró, László
Semeniuk, Konstantin
description 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-NbS 2 . 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-NbS 2 , 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.
doi_str_mv 10.1038/s41699-021-00265-6
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subjects 639/766/119/1002
639/766/119/2792/4129
639/766/119/995
Charge density waves
Charge transport
Chemistry and Materials Science
Condensed Matter
Conductors
Crystal defects
Crystals
Heterostructures
Kondo effect
Low temperature
Magnetic moments
Materials Science
Nanotechnology
Physics
Quantum Hall effect
Scattering
Single crystals
Strongly Correlated Electrons
Superlattices
Surfaces and Interfaces
Thin Films
title Unidirectional Kondo scattering in layered NbS2
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