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We report transverse and longitudinal magneto-transport properties of NbAs2single crystals. Attributing to the electron-hole compensation, non-saturatinglarge transverse magnetoresistance reaches up to 8000 at 9 T at 1.8 K withmobility around 1 to 2 m^2V^-1S^-1. We present a thorough study ofangular-dependent Shubnikov-de Haas (SdH) quantum oscillations of NbAs2. Threedistinct oscillation frequencies are identified. First-principles calculationsreveal four types of Fermi pockets: electron alpha pocket, hole beta pocket,hole gamma pocket and small electron delta pocket. Although the angulardependence of alpha, beta and delta agree well with the SdH data, it is unclearwhy the gamma pocket is missing in SdH. Negative longitudinal magnetoresistanceis observed which may be linked to novel topological states in this material,although systematic study is necessary to ascertain its origin.

Fermi surface topology and negative longitudinal magnetoresistance observed in centrosymmetric NbAs2 semimetal