43 citations · 161 across the 9 of their papers we have counts for
4 papers · 1 filter
Circulating currents and magnetic moments in quantum rings
Michele Cini, Enrico Perfetto, Gianluca Stefanucci
In circuits containing closed loops the operator for the current is determined by charge conservation up to an arbitrary divergenceless current. In this work we propose a formula t…
Generalized waveguide approach to tight-binding wires: Understanding large vortex currents in quantum rings
Gianluca Stefanucci, Enrico Perfetto, Stefano Bellucci +1
We generalize the quantum waveguide approach to Hückel or tight-binding models relevant to unsaturated $\p$ molecular devices. A Landauer-like formula for the current density throu…
Ultrafast manipulation of electron spins in a double quantum dot device: A real-time view
Gianluca Stefanucci, Enrico Perfetto, Michele Cini
We consider a double quantum dot system with two embedded and non-aligned spin impurities to manipulate the magnitude and polarization of the electron spin density. The device is a…
Spin-flip scattering in time-dependent transport through a quantum dot: Enhanced spin-current and inverse tunneling magnetoresistance
Enrico Perfetto, Gianluca Stefanucci, Michele Cini
We study the effects of spin-flip scatterings on the time-dependent transport properties through a magnetic quantum dot attached to normal and ferromagnetic leads. The transient sp…