We develop a time-dependent nonequilibrium Green function (NEGF) approach to the
problem of spin pumping by precessing magnetization in one of the ferromagnetic layers …

The control and generation of spin-polarized current (SPC) without magnetic materials and
an external magnetic field is a big challenge in spintronics and normally requires a spin-flip …

We calculate analytically the Floquet scattering matrix for a periodically driven double barrier
structure. Our approach takes into account dynamical effects which become necessarily …

We demonstrate a spin pump to generate pure spin current of tunable intensity and
polarization in the absence of charge current. The pumping functionality is achieved by …

The evolution-operator approach is applied to studying photon-electron-pumping effects on
a quantum dot connected to two magnetic leads in the presence of both via-dot and over-dot …

We investigate quantum charge and spin pumping in armchair graphene nanoribbons under
a single ac gate voltage connected with nonmagnetic/ferromagnetic leads via the …

We derive a nonperturbative solution to the Floquet nonequilibrium Green function (Floquet
NEGF) describing open quantum systems periodically driven by an external field of arbitrary …

We investigate the adiabatic quantum pump phenomena in a semiconductor with Rashba
and Dresselhaus spin–orbit couplings (SOCs). Although it is driven by applying spin …

We propose a possible electrical controllable spin pump based on a zigzag silicene
nanoribbon ferromagnetic junction by applying two time-dependent perpendicular electric …

We numerically study the parametric pumped current when magnetic field is applied both in
the adiabatic and nonadiabatic regimes. In particular, we investigate the nature of pumped …