We theoretically study the conductance quantization and Andreev reflection of narrow ferromagnet/superconductor point contacts. The conductance quantization is shown to depend on whether the contact region is superconducting or ferromagnetic as well as on the strength of the exchange field in the ferromagnet. The Andreev reflection is more suppressed than that of the superconducting contact. We also find that the conductance-voltage curve shows a bump at zero bias voltage if there is no interfacial scattering. On the contrary, the conductance-voltage curve shows a dip if the contact has an interfacial scattering.
ASJC Scopus subject areas
- Physics and Astronomy(all)