Charge and spin transport through a ferromagnet/insulator/unconventional superconductor junction

Details Charge and spin transport through a ferromagnet/insulator/unconventional superconductor junction Charge and spin transport through a ferromagnet/insulator/unconventional superconductor junction

2011-01-25

arxiv.org/abs/1101.4782v1

Physics

Condensed Matter

Superconductivity

10 pages, 6 figures

Scientific paper

We analyze the charge and spin transport through a ballistic ferromagnet/insulator/superconductor junction by means of the Bogoliubov-de Gennes equations. For the ferromagnetic side we assume that ferromagnetism may be driven by an unequal mass renormalization of oppositely polarized carriers, i.e. a spin bandwidth asymmetry, and/or by a rigid splitting of up-and down-spin electron bands, as in a standard Stoner ferromagnet, whereas the superconducting side is assumed to exhibit a d-wave symmetry of the order parameter, which can be pure or accompanied by a minority component breaking time-reversal symmetry. Several remarkable features in the charge conductance arise in this kind of junction, providing useful information about the mechanism of ferromagnetism in the ferromagnetic electrode, as well as of the order parameter symmetry in the superconducting one. In particular, we show that when a time-reversal symmetry breaking superconductor is considered, the use of the two kinds of ferromagnet mentioned above represents a valuable tool to discriminate between the different superconducting mixed states. We also explain how this junction may mimic a switch able to turn on and off a spin current, leaving the charge conductance unchanged, and we show that for a wide range of insulating barrier strengths, a spin bandwidth asymmetry ferromagnet may support a spin current larger than a standard Stoner one.

Affiliated with

Also associated with

No associations

Rating

Charge and spin transport through a ferromagnet/insulator/unconventional superconductor junction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Charge and spin transport through a ferromagnet/insulator/unconventional superconductor junction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge and spin transport through a ferromagnet/insulator/unconventional superconductor junction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-542332