Magnetic freeze-out and anomalous Hall effect in ZrTe5

The ultra-quantum limit is achieved when a magnetic field confines an electron gas in its lowest spin-polarised Landau level. Here we show that in this limit, electron doped ZrTe 5 shows a metal-insulator transition followed by a sign change of the Hall and Seebeck effects at low temperature. We att...

Full description

Saved in:
Bibliographic Details
Published in:npj quantum materials 2022-07, Vol.7 (1), p.1-7, Article 71
Main Authors: Gourgout, Adrien, Leroux, Maxime, Smirr, Jean-Loup, Massoudzadegan, Maxime, Lobo, Ricardo P. S. M., Vignolles, David, Proust, Cyril, Berger, Helmuth, Li, Qiang, Gu, Genda, Homes, Christopher C., Akrap, Ana, Fauqué, Benoît
Format: Article
Language:English
Subjects:
639/301/119/2792/4128
639/766/119/995
Anisotropy
Carrier density
Condensed Matter
Condensed Matter Physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Current carriers
Electromagnetism
Electron gas
Electron spin
Hall effect
Insulators
Laboratories
Low temperature
Magnetic fields
Materials Science
Metal-insulator transition
Phase transitions
Physics
Physics and Astronomy
Population decline
Quantum Physics
Strongly Correlated Electrons
Structural Materials
Surfaces and Interfaces
Thin Films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The ultra-quantum limit is achieved when a magnetic field confines an electron gas in its lowest spin-polarised Landau level. Here we show that in this limit, electron doped ZrTe 5 shows a metal-insulator transition followed by a sign change of the Hall and Seebeck effects at low temperature. We attribute this transition to a magnetic freeze-out of charge carriers on the ionized impurities. The reduction of the charge carrier density gives way to an anomalous Hall response of the spin-polarised electrons. This behavior, at odds with the usual magnetic freeze-out scenario, occurs in this Dirac metal because of its tiny Fermi energy, extremely narrow band gap and a large g -factor. We discuss the different possible sources (intrinsic or extrinsic) for this anomalous Hall contribution.
ISSN:2397-4648
2397-4648
DOI:10.1038/s41535-022-00478-y