Influence of different band masses on ballistic charge transport in ferromagnet–superconductor–ferromagnet trilayers |
| |
Authors: | Z Popovi M Boovi Z Radovi |
| |
Institution: | aDepartment of Physics, University of Belgrade, P.O. Box 368, 11001 Belgrade, Serbia |
| |
Abstract: | We study transport properties of clean FISIF double-barrier junctions consisting of metallic or semiconducting ferromagnets (F), a superconductor (S), and insulating interfaces (I). We solve the scattering problem based on the Bogoliubov–de Gennes equation and calculate differential conductance for arbitrary interface transparency, different effective band masses and Fermi wave vectors in the conductors. We analyze size and coherence effects that characterize ballistic transport: subgap transmission and geometrical oscillations of the conductance. We find that different band masses, as well as different Fermi wave vectors, affect the transport properties in a way similar to interfaces of a finite transparency. In all these cases, charge transport is reduced to resonant tunneling through the quasi-bound states in the superconducting film. |
| |
Keywords: | Spin-polarized ballistic transport Superconductor– semiconducting ferromagnet tunnel junctions |
本文献已被 ScienceDirect 等数据库收录! |
|