title: Andreev reflection and Aharonov-Bohm oscillations through a parallel-coupled double quantum dot with spin-flip scattering.
abstract: Using nonequilibrium Green's function techniques, we investigate Andreev reflection and Aharonov-Bohm oscillations through a parallel-coupled double quantum dot connected with a ferromagnetic lead and a superconductor lead. The possibility of controlling Andreev reflection and Aharonov-Bohm oscillations of the system is explored by tuning the interdot coupling, the gate voltage, the magnetic flux, and the intradot spin-flip scattering. When the spin-flip scattering increases, Fano resonant peaks resulting from the asymmetrical levels of the two quantum dots begin to split, and Aharonov-Bohm oscillations are suppressed. Due to the interdot coupling, one strongly and one weakly coupled state of the system can be formed. The magnetic flux can exchange the function of the two states, which leads to a swap effect.
authors.affiliation: College of Physics, Hebei Normal University, Shijiazhuang 050016, People's Republic of China. Hebei Advanced Film Laboratory, Shijiazhuang 050016, People's Republic of China.
authors.forename: Jin-Liang
authors.initials: JL
authors.lastname: Li
authors.forename: Yu-Xian
authors.initials: YX
authors.lastname: Li