Chiral magnetoresistance in the Weyl semimetal NbP

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Autor/in:
Erscheinungsjahr:
2017
Medientyp:
Text
Schlagworte:
  • Metalloids
  • Fermions
  • Topological semimetals
  • Insulators
  • Quantum Dots
  • Spin
  • Metalloids
  • Fermions
  • Topological semimetals
  • Insulators
  • Quantum Dots
  • Spin
Beschreibung:
  • NbP is a recently realized Weyl semimetal (WSM), hosting Weyl points through which conduction and valence bands cross linearly in the bulk and exotic Fermi arcs appear. The most intriguing transport phenomenon of a WSM is the chiral anomaly-induced negative magnetoresistance (NMR) in parallel electric and magnetic fields. In intrinsic NbP the Weyl points lie far from the Fermi energy, making chiral magneto-transport elusive. Here, we use Ga-doping to relocate the Fermi energy in NbP sufficiently close to the W2 Weyl points, for which the different Fermi surfaces are verified by resultant quantum oscillations. Consequently, we observe a NMR for parallel electric and magnetic fields, which is considered as a signature of the chiral anomaly in condensed-matter physics. The NMR survives up to room temperature, making NbP a versatile material platform for the development of Weyltronic applications.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH

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oai:www.edit.fis.uni-hamburg.de:publications/47c6d3eb-4893-49f3-ab31-42b53d8921f7