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Transport features of electron and hole quantum wires with Rashba coupling

M. M. Gelabert-2011-01-01-DIGITAL.CSIC (Spanish National Research Council (CSIC))
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This thesis studies the effects of the Rashba spin-orbit coupling on the transport properties of electron and hole quantum wires.For each case, a specific physical system is considered: the first one is a quantum wire with inhomogeneous Rashba coupling while the second is a quantum wire with homogeneous Rashba intensity and with external magnetic field; they are studied in the first (electrons) and the second (holes) parts of this work, respectively.Both systems are examples of the effects of the Rashba spin-orbit coupling on the physics of transport.In Part I, for electron systems, we study the conductance and polarization of the outgoing current for an incident unpolarized electron beam.The electron conductance of a quantum wire has a staircase dependence with energy, where each step is a conductance plateau.With the Rashba inhomogeneity a Fano dip appears at the end of each plateau, at specific energies, and we observe how the outgoing current is spin polarized.This current polariza

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This thesis studies the effects of the Rashba spin-orbit coupling on the transport properties of electron and hole quantum wires.For each case, a specific physical system is considered: the first one is a quantum wire with inhomogeneous Rashba coupling while the second is a quantum wire with homogeneous Rashba intensity and with external magnetic field; they are studied in the first (electrons) and the second (holes) parts of this work, respectively.Both systems are examples of the effects of the Rashba spin-orbit coupling on the physics of transport.In Part I, for electron systems, we study the conductance and polarization of the outgoing current for an incident unpolarized electron beam.The electron conductance of a quantum wire has a staircase dependence with energy, where each step is a conductance plateau.With the Rashba inhomogeneity a Fano dip appears at the end of each plateau, at specific energies, and we observe how the outgoing current is spin polarized.This current polariza

Keywords

PhysicsCondensed matter physicsElectronQuantum wireCoupling (piping)Spin–orbit interactionRashba effectQuantum

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