The strain and electric field modulation of magnetic properties in topological crystalline insulator thin films

Abstract

In the present paper, the strain and the electric field effects on the Pauli spin paramagnetic susceptibility (PSPS) of topological crystalline insulator SnTe (0 0 1) thin films are studied, employing k→·p→ theory, the Green’s function approach, and the Boltzmann method. The intrinsic hybridization between the front and back surfaces induces a gap and shifts the crossover in PSPS. We demonstrate that the crossover intensity decreases with strain and electric field at a certain hybridization potential, while its position does not change (fluctuates) with the strain (electric field). Our results may provide useful information to design real magnetic devices.