Rashba effect in quantum networks
نویسندگان
چکیده
Dario Bercioux,1,2 Michele Governale,3 Vittorio Cataudella,2 and Vincenzo Marigliano Ramaglia2 1Institut für Theoretische Physik, Universität Regensburg, D-93040, Germany 2Coherentia-INFM and Dipartimento di Scienze Fisiche, Università degli Studi “Federico II,” I-80126 Napoli, Italy 3NEST-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy Received 18 February 2005; revised manuscript received 24 May 2005; published 2 August 2005
منابع مشابه
Quantum networks in the presence of the Rashba effect and a magnetic field
We use a simple formalism to calculate the conductance of any quantum network consisting of single-channel one-dimensional quantum wires in the presence of Rashba spin-orbit coupling and a coupling magnetic field. We show that the Rashba effect may give rise to an electron localization phenomenon similar to the Aharonov–Bohm effect. This localization effect can be attributed to spin precession ...
متن کاملSpin Currents in Semiconductor Nanostructures: a Nonequilibrium Green-function Approach
6 SO COUPLINGS IN LOW-DIMENSIONAL SEMICONDUCTORS 10 6.1 Rashba coupling in bulk 2DEG . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.2 Rashba coupling in quantum wires . . . . . . . . . . . . . . . . . . . . . . . . 15 6.2.1 Energy dispersion of Rashba spin-split transverse propagating subbands 15 6.2.2 Spin precession in Rashba quantum wires . . . . . . . . . . . . . . . . . 17 6.3 Di...
متن کاملLocalization effects in a periodic quantum graph with magnetic field and spin-orbit interaction
A general technique for the study of embedded quantum graphs with magnetic fields and spin-orbit interaction is presented. The analysis is used to understand the contribution of Rashba constant to the extreme localization induced by magnetic field in the T3 shaped quantum graph. We show that this effect is destroyed at generic values of the Rashba constant. On the other hand, for certain combin...
متن کاملRashba effect in strained InGaAs/InP quantum wire structures
We investigated the effect of the Rashba spin–orbit coupling in two-dimensional electron gases and quasi one-dimensional wire structures based on a strained InGaAs/InP heterostructure. For the two-dimensional electron gas structure it is demonstrated that the Rashba effect can be controlled by using a gate electrode. By a detailed discussion it is shown that our heterostructure can be employed ...
متن کاملFano-Rashba effect in quantum dots.
We consider the electronic transport through a Rashba quantum dot coupled to ferromagnetic leads. We show that the interference of localized electron states with resonant electron states leads to the appearance of the Fano-Rashba effect. This effect occurs due to the interference of bound levels of spin-polarized electrons with the continuum of electronic states with an opposite spin polarizati...
متن کامل