Longitudinal Hall effect in SrAs3

An unusual first-order Hall effect with the magnetic field parallel either to the current or to the Hall field is observed in monoclinic semimetallic SrAs3. Data are presented showing the dependence of this longitudinal Hall effect (LHE) on orientation, temperature, and magnetic field strength. Both...
Ausführliche Beschreibung

An unusual first-order Hall effect with the magnetic field parallel either to the current or to the Hall field is observed in monoclinic semimetallic SrAs3. Data are presented showing the dependence of this longitudinal Hall effect (LHE) on orientation, temperature, and magnetic field strength. Both symmetry-allowed longitudinal components have been measured and are of the same order of magnitude as the transverse or normal Hall effect. The signs of the longitudinal Hall components are determined using samples with well-defined c orientations. The occurrence of a LHE cannot be explained within a simple one-band model of conductivity. For monoclinic symmetry, however, nonvanishing longitudinal coefficients are derived from a two-band model. Ausführliche Beschreibung