Articles dans des revues à comité de lecture
|Charge and spin polarized currents in mesoscopic rings with Rashba spin-orbit interactions coupled to an electron reservoir|
|Ellner M., Bolívar N., Berche B., Medina E.|
|Phys. Rev. B 90 (2014) 085305|
|DOI : 10.1103/PhysRevB.90.085305|
|ArXiv : arxiv:1406.4659 [PDF]|
The electronic states of a mesoscopic ring are assessed in the presence of Rashba Spin Orbit coupling and a U(1) gauge ﬁeld. Spin symmetric coupling to an ideal lead is implemented following Buttiker’s voltage probe. The exact density of states is derived using the reservoir uncoupled eigenstates as basis functions mixed by the reservoir coupling. The decay time of uncoupled electron eigenstates is derived by ﬁtting the broadening proﬁles. The spin and charge persistent currents are computed in the presence of the SO interaction and the reservoir coupling for two distinct scenarios of the electron ﬁlling fraction. The degradation of the persistent currents depends uniformly of the reservoir coupling but nonuniformly in temperature, the latter due to the fact that currents emerge from diﬀerent depths of the fermi sea, and thus for some regimes of ﬂux, they are provided with a protective gap. Such ﬂux regimes can be tailored by the SO coupling for both charge and spin currents.