The Weyl semimetal NbP exhibits a very small Fermi surface consisting of two electron and two hole pockets, whose fourfold degeneracy in k space is tied to the rotational symmetry of the underlying tetragonal crystal lattice. By applying uniaxial stress, the crystal symmetry can be reduced, which successively leads to a degeneracy lifting of the Fermi-surface pockets. This is reflected by a splitting of the Shubnikov–de Haas frequencies when the magnetic field is aligned along the c axis of the tetragonal lattice. In this study, we present the measurement of Shubnikov–de Haas oscillations of single-crystalline NbP samples under uniaxial tension, combined with state-of-the-art calculations of the electronic band structure. Our results show qualitative agreement between calculated and experimentally determined Shubnikov–de Haas frequencies, demonstrating the robustness of the band-structure calculations upon introducing strain. Furthermore, we predict a significant shift of the Weyl points with increasing uniaxial tension, allowing for an effective tuning to the Fermi level at only 0.8% of strain along the a axis.
Description
Phys. Rev. B 102, 035132 (2020) - Effect of uniaxial stress on the electronic band structure of NbP
%0 Journal Article
%1 PhysRevB.102.035132
%A Schindler, Clemens
%A Noky, Jonathan
%A Schmidt, Marcus
%A Felser, Claudia
%A Wosnitza, Jochen
%A Gooth, Johannes
%D 2020
%I American Physical Society
%J Phys. Rev. B
%K a d
%N 3
%P 035132
%R 10.1103/PhysRevB.102.035132
%T Effect of uniaxial stress on the electronic band structure of NbP
%U https://link.aps.org/doi/10.1103/PhysRevB.102.035132
%V 102
%X The Weyl semimetal NbP exhibits a very small Fermi surface consisting of two electron and two hole pockets, whose fourfold degeneracy in k space is tied to the rotational symmetry of the underlying tetragonal crystal lattice. By applying uniaxial stress, the crystal symmetry can be reduced, which successively leads to a degeneracy lifting of the Fermi-surface pockets. This is reflected by a splitting of the Shubnikov–de Haas frequencies when the magnetic field is aligned along the c axis of the tetragonal lattice. In this study, we present the measurement of Shubnikov–de Haas oscillations of single-crystalline NbP samples under uniaxial tension, combined with state-of-the-art calculations of the electronic band structure. Our results show qualitative agreement between calculated and experimentally determined Shubnikov–de Haas frequencies, demonstrating the robustness of the band-structure calculations upon introducing strain. Furthermore, we predict a significant shift of the Weyl points with increasing uniaxial tension, allowing for an effective tuning to the Fermi level at only 0.8% of strain along the a axis.
@article{PhysRevB.102.035132,
abstract = {The Weyl semimetal NbP exhibits a very small Fermi surface consisting of two electron and two hole pockets, whose fourfold degeneracy in k space is tied to the rotational symmetry of the underlying tetragonal crystal lattice. By applying uniaxial stress, the crystal symmetry can be reduced, which successively leads to a degeneracy lifting of the Fermi-surface pockets. This is reflected by a splitting of the Shubnikov–de Haas frequencies when the magnetic field is aligned along the c axis of the tetragonal lattice. In this study, we present the measurement of Shubnikov–de Haas oscillations of single-crystalline NbP samples under uniaxial tension, combined with state-of-the-art calculations of the electronic band structure. Our results show qualitative agreement between calculated and experimentally determined Shubnikov–de Haas frequencies, demonstrating the robustness of the band-structure calculations upon introducing strain. Furthermore, we predict a significant shift of the Weyl points with increasing uniaxial tension, allowing for an effective tuning to the Fermi level at only 0.8% of strain along the a axis.},
added-at = {2021-06-24T13:15:59.000+0200},
author = {Schindler, Clemens and Noky, Jonathan and Schmidt, Marcus and Felser, Claudia and Wosnitza, Jochen and Gooth, Johannes},
biburl = {https://www.bibsonomy.org/bibtex/2bdf0bfab137d58194d2c96200cd82a99/ctqmat},
day = 20,
description = {Phys. Rev. B 102, 035132 (2020) - Effect of uniaxial stress on the electronic band structure of NbP},
doi = {10.1103/PhysRevB.102.035132},
interhash = {a373ac42bedb4970807da0923847e294},
intrahash = {bdf0bfab137d58194d2c96200cd82a99},
journal = {Phys. Rev. B},
keywords = {a d},
month = jul,
number = 3,
numpages = {9},
pages = 035132,
publisher = {American Physical Society},
timestamp = {2023-01-16T14:49:29.000+0100},
title = {Effect of uniaxial stress on the electronic band structure of NbP},
url = {https://link.aps.org/doi/10.1103/PhysRevB.102.035132},
volume = 102,
year = 2020
}