Title: Tunable Anomalous Andreev Reflection and Triplet Pairings in Spin Orbit Coupled Graphene,
Abstract: We theoretically study scattering process and superconducting triplet
correlations in a graphene junction comprised of ferromagnet-RSO-superconductor
in which RSO stands for a region with Rashba spin orbit interaction. Our
results reveal spin-polarized subgap transport through the system due to an
anomalous equal-spin Andreev reflection in addition to conventional back
scatterings. We calculate equal- and opposite-spin pair correlations near the
F-RSO interface and demonstrate direct link of the anomalous Andreev reflection
and equal-spin pairings arised due to the proximity effect in the presence of
RSO interaction. Moreover, we show that the amplitude of anomalous Andreev
reflection, and thus the triplet pairings, are experimentally controllable when
incorporating the influences of both tunable strain and Fermi level in the
nonsuperconducting region. Our findings can be confirmed by a conductance
spectroscopy experiment and provide better insights into the proximity-induced
RSO coupling in graphene layers reported in recent experiments.