A theoretical study on the transport property of the La 0.7 Sr 0.3 MnO 3 /Si p-n heterojunction

The transport property of the La 0.7 Sr 03 MnO 3 /Si heterostructure was investigated theoretically by applying the drift-diffusion model to the present system. A simple scenario of the semiconductor band and electric field at the interface region of the heterostructure with various bias voltages are presented. The good agreement between the self-consistent calculated results and the experimental data indicates that the proposed band picture is valid for the interpretation of the transport property of the p-n heterojunctions made of La 0.7 Sr 0.3 MnO 3 and Si regardless of the complexity of the interface structures and multi-couplings among charge, spin, lattice and orbital of manganites.