The Hall Effect in Single Crystals of Topological Semimetals WTe2 and MoTe2

The Hall effect in single crystals of topological semimetals WTe 2 and MoTe 2 is studied in the temperature range from 2 to 100 K and in magnetic fields up to 9 T. It is established that the Hall resistivity of WTe 2 shows a nonlinear dependence on the magnetic field at temperatures below 100 K. At the same time, the Hall resistivity of MoTe 2 depends linearly on the magnetic field in the temperature range from 2 to 25 K and a nonlinear contribution appears at 50 K. Along with the known mechanism of compensation/decompensation of electron and hole charge carriers, the nonlinear dependence of the Hall resistivity of WTe 2 and MoTe 2 single crystals on the magnetic field is associated with the scattering of charge carriers on the surface.