Quasilinear quantum magnetoresistance in pressure-induced superconductor CrAs

We have measured the transverse magnetoresistance of CrAs under pressure. Pressure-induced superconductivity was recently observed in CrAs in the vicinity of the magnetic order. The low-temperature magnetoresistance shows non-saturating quasilinear magnetic field dependence up to 14 T in the pressure range close to where the superconducting transition temperature is maximised. Our bandstructure calculations reveal a subtle band crossing near the Y-point of the Brillouin zone, which we argue is responsible for the observed quasilinear magnetoresistance. Comparison with CrP, which exhibits conventional quadratic magnetoresistance will be made and discussed in this presentation.