Theory of charge transport in ferromagnetic semiconductor/s-wave superconductor junction
arXiv:0906.4244 · doi:10.1016/j.physc.2009.05.071
Abstract
We study tunneling conductance in ferromagnetic semiconductor/insulator/s-wave superconductor junction where Rashba spin-orbit interaction (RSOI) and exchange field are taken into account in the ferromagnetic semiconductor. We show that normalized conductance at zero voltage has a maximum as a function of RSOI for high transparent interface and finite exchange field. This is because Andreev reflection probability shows a nonmonotonic dependence on RSOI in the presence of the exchange field. On the other hand, for intermediate transparent interface, normalized conductance at zero voltage has a reentrant shape at zero or small exchange field with increasing RSOI but is monotonically increasing by RSOI at large exchange field.
6 pages, 6 figures
References in corpus (7)
- Dissipationless Quantum Spin Current at Room Temperature
- Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
- Transport equations for a two-dimensional electron gas with spin-orbit interaction
- Andreev bound states and tunneling characteristics of a non-centrosymmetric superconductor
- Charge transport in two dimensional electron gas/superconductor junctions with Rashba spin-orbit coupling
- Intrinsically s-wave like property of triplet superconductors with spin-orbit coupling
- Spin-polarized proximity effect in superconducting junctions