Magnetic freeze-out and anomalous Hall effect in ZrTe5
Journal Article
·
· npj Quantum Materials
- Centre National de la Recherche Scientifique (CNRS) (France); Sorbonne Univ., Paris (France); Univ. Paris-Saclay, Gif-sur-Yvette (France)
- Univ. of Toulouse (France)
- Centre National de la Recherche Scientifique (CNRS) (France); Univ. Paris-Saclay, Gif-sur-Yvette (France)
- Ecole Polytechnique Federale Lausanne (EPFL) (Switzerland)
- Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- University of Fribourg (Switzerland)
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 ZrTe5 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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1845423
- Report Number(s):
- BNL-222762-2022-JAAM
- Journal Information:
- npj Quantum Materials, Journal Name: npj Quantum Materials Journal Issue: 1 Vol. 7; ISSN 2397-4648
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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