Berry phase and band structure analysis of the Weyl semimetal NbP

Sergelius P, Gooth J, Baessler S, Zierold R, Wiegand C, Niemann A, Reith H, Shekhar C, Felser C, Yan B, Nielsch K (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Scientific Reports Nature Publishing Group: Open Access Journals - Option B

Book Volume: 6

Article Number: 33859

DOI: 10.1038/srep33859

Abstract

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.

Involved external institutions

Universität Hamburg (UHH) DE Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Sergelius, P., Gooth, J., Baessler, S., Zierold, R., Wiegand, C., Niemann, A.,... Nielsch, K. (2016). Berry phase and band structure analysis of the Weyl semimetal NbP. Scientific Reports, 6. https://doi.org/10.1038/srep33859

MLA:

Sergelius, Philip, et al. "Berry phase and band structure analysis of the Weyl semimetal NbP." Scientific Reports 6 (2016).

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