TY - JOUR
T1 - Unified formalism of Andreev reflection at a ferromagnet/superconductor interface
AU - Chen, Tingyong
AU - Tesanovic, Z.
AU - Chien, C. L.
PY - 2012/10/3
Y1 - 2012/10/3
N2 - We present a unified formalism of Andreev reflection of a partial polarized current at a ferromagnet/superconductor interface instead of assuming a linear combination of unpolarized and polarized currents. The Andreev reflection is limited by the states of minority spins and the extra majority spins become evanescent wave. We further study the effects of spin polarization, inelastic scattering, and interfacial scattering on the Andreev reflection, normal reflection, and transmitted probabilities in equilibrium as well as under a bias. Our model, which reduces to those of Blonder, Tinkham, and Klapwijk, Mazin, and Dynes in three limiting cases, provides a significantly better description of the experimental results.
AB - We present a unified formalism of Andreev reflection of a partial polarized current at a ferromagnet/superconductor interface instead of assuming a linear combination of unpolarized and polarized currents. The Andreev reflection is limited by the states of minority spins and the extra majority spins become evanescent wave. We further study the effects of spin polarization, inelastic scattering, and interfacial scattering on the Andreev reflection, normal reflection, and transmitted probabilities in equilibrium as well as under a bias. Our model, which reduces to those of Blonder, Tinkham, and Klapwijk, Mazin, and Dynes in three limiting cases, provides a significantly better description of the experimental results.
UR - http://www.scopus.com/inward/record.url?scp=84867063284&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84867063284&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.109.146602
DO - 10.1103/PhysRevLett.109.146602
M3 - Article
AN - SCOPUS:84867063284
SN - 0031-9007
VL - 109
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 146602
ER -