Quantum antidot as a controllable spin injector and spin filter

Abstract

We propose a device based on an antidot embedded in a narrow quantum wire in the edge state regime, that can be used to inject and/or to control spin polarized current. The operational principle of the device is based on the effect of resonant backscattering from one edge state into another through a localized quasi-bound states, combined with the effect of Zeeman splitting of the quasibound states in sufficiently high magnetic field. We outline the device geometry, present detailed quantum-mechanical transport calculation and suggest a possible scheme to test the device performance and functionality.

References in corpus (10)

• Quantum Computation with Quantum Dots
• Quantum Dot as Spin Filter and Spin Memory
• Quantum Transport in Nonuniform Magnetic Fields: Aharonov-Bohm Ring as a Spin Switch
• Detecting Spin-Polarized Currents in Ballistic Nanostructures
• The Collapse of the Spin-Singlet Phase in Quantum Dots
• Detection of Coulomb Charging around an Antidot in the Quantum Hall Regime
• Energetics of Quantum Antidot States in Quantum Hall Regime
• Coulomb blockade of tunnelling through compressible rings formed around an antidot: an explanation for $h/2e$ Aharonov-Bohm oscillations
• Spin switching in semiconductor quantum dots through spin-orbit coupling
• Resonance Patterns of an Antidot Cluster: From Classical to Quantum Ballistics

Cited by in corpus (12)

• Spin polarization of edge states and magnetosubband structure in quantum wires
• Suppression of compressible edge channels and spatial spin polarization in the integer quantum Hall regime
• Quantum interference hybrid spin-current injector
• The quenching of compressible edge states around antidots
• Spin polarization and g-factor enhancement in graphene nanoribbons in magnetic field
• Protocol for Fermionic Positive-Operator-Valued Measures
• Time-dependent magnetotransport of a wave packet in a quantum wire with embedded quantum dots
• Where are the edge-states near the quantum point contacts? A self-consistent approach
• Tuning Fano-type resonances in coupled quantum point contacts by applying asymmetric voltages
• Network architecture of energy landscapes in mesoscopic quantum systems
• Spin splitting and switching effect in a four-terminal two-dimensional electron gas nanostructure
• Geometric Suppression of Single-Particle Energy Spacings in Quantum Antidots