Effect of tilted magnetic field on magnetosubbands and conductance of bi-layer quantum wire
arXiv:1508.05793 · doi:10.1016/j.physb.2016.06.017
Abstract
The single electron magnetotransport in a vertical bi-layer semiconductor nanowire made of InAlAs/InGaAs and AlGaAs/GaAs heterostructure is theoretically studied. The magnetic field is directed perpendicularily to the main (transport) axis of the quantum wire and both non-zero components of magnetic field, that is the transverse and the vertical ones, allow to change the magnitude of intra-layer and inter-layer subbands mixing, respectively. We analyze in detail the changes introduced to energy dispersion relation E(k) by strong titled magnetic field up to several teslas for a symmetric and an asymmetric confining potential in the growth direction. These calculated energy dispersion relations are thereafter used to show that the value of conductance of bi-layer nanowire may jump as well as drop by few conductance quanta when the Fermi energy is changed what in conjunction with spin Zeeman effect may give a moderately spin polarized current.
References in corpus (8)
- Room temperature spin filtering in epitaxial cobalt-ferrite tunnel barriers
- Edge Dynamics in a Quantum Spin Hall State: Effects from Rashba Spin-Orbit Interaction
- Incipient Formation of an Electron Lattice in a Weakly-Confined Quantum Wire
- Many-body effects in a quasi-one-dimensional electron gas
- Backscattering in helical edge states from a magnetic impurity and Rashba disorder
- Time-dependent magnetotransport in an interacting double quantum wire with window coupling
- Partial spin polarization of conductance in vertical bi-layer nanowire with rectangular and smooth lateral confinement potential
- An electron motion induced by magnetic field pulse in bi-layer quantum wire