en
Scientific article
Open access
English

Tuning magnetotransport in a compensated semimetal at the atomic scale

Published inNature communications, 8892
Publication date2015
Abstract

Either in bulk form, or in atomically thin crystals, layered transition metal dichalcogenides continuously reveal new phenomena. The latest example is 1T'-WTe2, a semimetal found to exhibit the largest known magnetoresistance in the bulk, and predicted to become a topological insulator in strained monolayers. Here we show that reducing the thickness through exfoliation enables the electronic properties of WTe2 to be tuned, which allows us to identify the mechanisms responsible for the observed magnetotransport down to the atomic scale. The longitudinal resistance and the unconventional magnetic field dependence of the Hall resistance are reproduced quantitatively by a classical two-band model for crystals as thin as six monolayers, whereas a crossover to an Anderson insulator occurs for thinner crystals. Besides establishing the origin of the magnetoresistance of WTe2, our results represent a complete validation of the classical theory for two-band electron-hole transport, and indicate that atomically thin WTe2 layers remain gapless semimetals.

Keywords
  • Semimetal
  • 2D materials
  • Transition Metal Dichalcogenides
  • Magneto-transport
Funding
  • Swiss National Science Foundation - Synergia
  • Autre - EU Graphene Flagship
Citation (ISO format)
WANG, Lin et al. Tuning magnetotransport in a compensated semimetal at the atomic scale. In: Nature communications, 2015, p. 8892. doi: 10.1038/ncomms9892
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal2041-1723
509views
210downloads

Technical informations

Creation02/04/2016 11:42:00 AM
First validation02/04/2016 11:42:00 AM
Update time03/15/2023 12:07:45 AM
Status update03/15/2023 12:07:44 AM
Last indexation01/16/2024 8:12:10 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack