The linear magnetoresistance from surface state of the Sb_2SeTe_2 topological insulator

摘要

A non-saturating linear magnetoresistance (MR) is observed in Sb_2SeTe_2 topological insulator. The results show that the MR slope and the critical magnetic field of the linear MR are proportional to the carrier mobility and inverse mobility, respectively. These are consistent with the prediction of a model, which is constructed by Parish and Littlewood [Nature 426, 162 (2003)], in the weak mobility fluctuation condition. The Kohler plot of the magnetoresistance does not collapse onto a single curve that supports the multi-carriers scattering mechanisms.