Publication Details:

Established in 2008

Journal or Publication Title:

Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես

Date of publication:

2011

Volume:

4

Number:

2

ISSN:

1829-1171

Official URL:

Coverage:

134-145

Abstract:

The quantum transport property of a mesoscopic device is investigated. A model for such mesoscopic device is proposed and it is formed of ferromagnetic/superconductor hybrid junction. An expression for the conductance was derived using Landauer-Buttiker formula. The effect of an external magnetic field was taken into consideration. The spin polarization is expressed in terms of both Andreev-reflection probabilities for spin-up and spin-down. Numerical calculations are performed for the present proposed nanoscale device. Our results showed that the proposed device operates in the mesoscopic regime as indicated from the dependence of the conductance on the temperature. Also, the results showed that two peaks appeared due to the Zeeman splitting of the quasiparticle density of states. The dependence of spin polarization on the considered parameters confirms that the spin flip of electrons when Andreev-reflection tunneling occurs through the junction.

Date created:

2011-09-28

Format:

pdf

Identifier:

oai:arar.sci.am:23299

Location of original object:

ՀՀ ԳԱԱ Հիմնարար գիտական գրադարան