Magnetotransport of single crystalline NbAs. (27th March 2015)

• Record Type: Journal Article
• Authors: Ghimire, N J; Luo, Yongkang; Neupane, M; Williams, D J; Bauer, E D; Ronning, F
• Is Part Of: Journal of physics. Volume 27:Number 15(2015)
• Publication Date: 2015-03-27
• Subjects: Weyl semimetal -- magnetoresistance -- mobility -- NbAs; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/27/15/152201
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We report transport measurement in zero and applied magnetic field on a single crystal of NbAs. Transverse and longitudinal magnetoresistance in the plane of this tetragonal structure does not saturate up to 9 T. In the transverse configuration ( H ∥ c, I ⊥ c ) it is 230 000% at 2 K. The Hall coefficient changes sign from hole-like at room temperature to electron-like below ∼150 K. The electron carrier density and mobility calculated at 2 K based on a single band approximation are 1.8 × 10 19 cm −3 and 3.5 × 10 5 cm 2 Vs −1, respectively. These values are similar to reported values for TaAs and NbP, and further emphasize that this class of noncentrosymmetric, transition-metal monopnictides is a promising family to explore the properties of Weyl semimetals and the consequences of their novel electronic structure.