GdV6Sn6: a Multi-carrier Metal with Non-magnetic 3d-electron Kagome Bands and 4f-electron Magnetism

TL;DR

This paper investigates the electronic and magnetic properties of GdV6Sn6, a compound with non-magnetic V-kagome layers and magnetic Gd layers, revealing unique magnetotransport phenomena and the interplay between magnetic order and electronic structure.

Contribution

It presents the first detailed study of GdV6Sn6's magnetotransport properties and their relation to its band structure, highlighting the coupling between Gd magnetism and V-kagome electronic states.

Findings

GdV6Sn6 shows non-linear Hall resistivity and resistance increase under high magnetic fields.

A magnetic transition at 5 K affects transport properties, indicating spin-electron coupling.

Band structure calculations link observed properties to V-kagome layers.

Abstract

Electronic properties of the single crystal of GdV6Sn6, where non-magnetic V-kagome layers are separated by magnetic Gd-triangular lattice, are investigated. GdV6Sn6 exhibits unique magnetotransport properties at low-temperature such as non-linear Hall resistivity and increase of resistance R in magnetic field H as R ~ H^0.75 up to 56 T with Shubnikov-De Haas oscillations. Investigation of the non-magnetic analogue YV6Sn6 and the first principles calculations reveal these properties are relevant to the bands arising from the V-kagome layer. A magnetic transition at 5 K in GdV6Sn6 modifies the transport properties, pointing to a coupling between Gd-spins on the triangular lattice and carriers in the V-kagome layer.