Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 24: Transport: Weyl Semimetals

TT 24.9: Vortrag

Dienstag, 8. März 2016, 12:00–12:15, H18

Fermi-surface topology of the Weyl semimetal NbP — •J. Klotz^1,2, Shu-Chun Wu³, Chandra Shekhar³, Yan Sun³, Marcus Schmidt³, Michael Nicklas³, Michael Baenitz³, M. Uhlarz¹, J. Wosnitza^1,2, Claudia Felser³, and Binghai Yan^3,4 — ¹Hochfeld-Magnetlabor (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Germany — ²Institut für Festkörperphysik, TU Dresden, Germany — ³Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — ⁴Max Planck Institute for the Physics of Complex Systems, Dresden, Germany

The recent discovery of Weyl semimetals in transition-metal monopnictides revealed an exotic topological matter. Weyl semimetals feature band crossings with massless dispersions in their bulk band structure, termed Weyl points. Here, we present a Fermi-surface study on the Weyl semimetal NbP that combines both experimental data and band-structure calculations. We employed torque magnetometry in order to measure the angular dependence of the de Haas-van Alphen effect in a 12 T / 350 mK system. The excellent agreement between measured and calculated quantum-oscillation frequencies evidences the existence of two electron and two hole pockets and allows to locate the position of the Weyl points with respect to the Fermi energy.