Berry phase and band structure analysis of the Weyl semimetal NbP.
Weyl semimetals are often considered the 3D-analogon of graphene or topological insulators. The evaluation of quantum oscillations in these systems remains challenging because there are often multiple conduction bands. We observe de Haas-van Alphen oscillations with several frequencies in a single crystal of the Weyl semimetal niobium phosphide. For each fundamental crystal axis, we can fit the raw data to a superposition of sinusoidal functions, which enables us to calculate the characteristic parameters of all individual bulk conduction bands using Fourier transform with an analysis of the temperature and magnetic field-dependent oscillation amplitude decay. Our experimental results indicate that the band structure consists of Dirac bands with low cyclotron mass, a non-trivial Berry phase and parabolic bands with a higher effective mass and trivial Berry phase.
Institute of Nanostructure and Solid-State Physics, University of Hamburg, 20355 Hamburg, Germany.
Philip
P
Sergelius
Institute of Nanostructure and Solid-State Physics, University of Hamburg, 20355 Hamburg, Germany.|IBM Research GmbH, 8803 Rueschlikon, Switzerland.
Johannes
J
Gooth
Institute of Nanostructure and Solid-State Physics, University of Hamburg, 20355 Hamburg, Germany.
Svenja
S
Bäßler
Institute of Nanostructure and Solid-State Physics, University of Hamburg, 20355 Hamburg, Germany.
Robert
R
Zierold
Institute of Nanostructure and Solid-State Physics, University of Hamburg, 20355 Hamburg, Germany.
Christoph
C
Wiegand
Institute of Nanostructure and Solid-State Physics, University of Hamburg, 20355 Hamburg, Germany.
Anna
A
Niemann
Institute of Nanostructure and Solid-State Physics, University of Hamburg, 20355 Hamburg, Germany.|Leibniz Institute for Solid State and Materials Research (IFW) Dresden, 01171 Dresden, Germany.
Heiko
H
Reith
Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany.
Chandra
C
Shekhar
Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany.
Claudia
C
Felser
Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany.|Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany.
Binghai
B
Yan
Institute of Nanostructure and Solid-State Physics, University of Hamburg, 20355 Hamburg, Germany.|Leibniz Institute for Solid State and Materials Research (IFW) Dresden, 01171 Dresden, Germany.
Kornelius
K
Nielsch
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