Thermomagnetic Transport in the Weyl Semimetal NbP

Weyl semimetals (WSM) combine both topological and semi-metallic effects in the transport of fermions through both bulk and surface states.~ The thermal transport properties, magneto-thermal conductivity, magneto-thermopower, and Anomalous Nernst Effect (ANE) of Weyl fermions are predicted$^{1}$~to contain interesting topological signatures.~~So far, one publication$^{2}$~reports experiments on the magneto-thermopower and ANE on Cd$_{3}$As$_{2}$, a Dirac semimetal.~ An inversion symmetry-breaking group of transition metal monopnictides, including NbP, TaP, NbAs, and TaAs, has been discovered and proven to be WSM.~ Here, we report on thermal transport in NbP on samples that are proven$^{3}$~to have an unsaturated, large magnetoresistance and ultrahigh mobilities.~ Specifically, we map the magneto-thermopower and ANE thermomagnetic tensor elements of single-crystal NbP in order to determine the effect of Fermi arcs on this transport, and we compare our results to computational models. 1. G. Sharma, et al.~ \textit{Phys. Rev. B}~\textbf{93}, 035116 (2016). 2. T. Liang, et al.~~arXiv:1610.02459 (2016). 3. C. Shekhar, et al.~~\textit{Nat. Phys.}~\textbf{11}~(2015).