Issue |
EPL
Volume 100, Number 1, October 2012
|
|
---|---|---|
Article Number | 17012 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/100/17012 | |
Published online | 18 October 2012 |
Equal-spin Andreev reflection in ferromagnet/superconductor junctions with the interfacial Rashba spin-orbit coupling
College of Science, Nanjing University of Aeronautics and Astronautics - Jiangsu 210016, China
Received: 19 July 2012
Accepted: 11 September 2012
We study the conductance spectra of ferromagnet/superconductor (F/S) junctions in the presence of the interfacial Rashba spin-orbit coupling (IRSOC). IRSOC provides the spin-flip mechanism with which the equal-spin Andreev reflection occurs. We first investigate the effect of the F spin polarization P on the conductance G and find that a zero-bias G peak forms for the highly polarized F in F/s-wave and F/dx2−y2-wave S junctions, while in F/dxy-wave S junctions with increasing P, G exhibits a conversion from a zero-bias peak to a zero-bias dip. For half-metal F (HMF)/S junctions with s-wave and dx2−y2-wave pairing by varying the magnetization direction α, G first increases and then decreases, exhibiting a maximal zero-bias peak at α = π/2, and in F/dxy-wave S junctions, G at nonzero bias exhibits a nonmonotonic behavior with α. The effect of the Fermi wave vector mismatch on G is also discussed.
PACS: 74.45.+c – Proximity effects; Andreev reflection; SN and SNS junctions / 74.20.Rp – Pairing symmetries (other than s-wave) / 74.55.+v – Tunneling phenomena: single particle tunneling and STM
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.