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Chiral magnetoresistance in the Weyl semimetal NbP

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Wu,  Shu-Chun
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Shekhar,  Chandra
Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Süß,  Vicky
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Yan,  Binghai
Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Niemann, A. C., Gooth, J., Wu, S.-C., Baessler, S., Sergelius, P., Huehne, R., et al. (2017). Chiral magnetoresistance in the Weyl semimetal NbP. Scientific Reports, 7: 43394, pp. 1-6. doi:10.1038/srep43394.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-E0FB-B
Abstract
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.