Networks of quantum nanorings: programmable spintronic devices

Abstract

An array of quantum rings with local (ring by ring) modulation of the spin orbit interaction (SOI) can lead to novel effects in spin state transformation of electrons. It is shown that already small (3x3, 5x5) networks are remarkably versatile from this point of view: Working in a given network geometry, the input current can be directed to any of the output ports, simply by changing the SOI strengths by external gate voltages. Additionally, the same network with different SOI strengths can be completely analogous to the Stern-Gerlach device, exhibiting spatial-spin entanglement.

4 pages, 3 figures, accepted by Nano Letters

References in corpus (13)

• Spin-dependent (magneto)transport through a ring due to spin-orbit interaction
• Direct observation of the Aharonov-Casher phase
• Experimental demonstration of the time reversal Aharonov-Casher effect
• Quantum rings as electron spin beam splitters
• Aharonov-Bohm Oscillations with Spin: Evidence for Berry's Phase
• Quantum Transport in Nonuniform Magnetic Fields: Aharonov-Bohm Ring as a Spin Switch
• Spintronic single qubit gate based on a quantum ring with spin-orbit interaction
• Spin Hall Current Driven by Quantum Interferences in Mesoscopic Rashba Rings
• Constructing Spin Interference Devices from Nanometric Rings
• Time dependent simulations of electron transport through a quantum ring: effect of the Lorentz force
• Electron spin interferometry using a semiconductor ring structure
• Interference induced preparation of spinpolarized electrons in a three-terminal quantum ring
• Time reversal Aharonov-Casher effect in mesoscopic rings with Rashba spin-orbital interaction

Cited by in corpus (33)

• Stability of spintronic devices based on quantum ring networks
• Magnetoconductance properties of rectangular arrays of spintronic quantum rings
• Few-electron artificial molecules formed by laterally coupled quantum rings
• Tuning of the spin-orbit interaction in a quantum dot by an in-plane magnetic field
• Aharonov-Casher and spin Hall effects in two-dimensional mesoscopic ring structures with strong spin-orbit interaction
• Spin transport through a quantum network: Effects of Rashba spin orbit interaction and Aharonov-Bohm flux
• Quantum rings with time dependent spin-orbit coupling: Rabi oscillations, spintronic Schrodinger-cat states, and conductance properties
• Logical XOR gate response in a quantum interferometer: A spin dependent transport
• All-spin logic operations: Memory device and Reconfigurable computing
• Flux induced semiconducting behavior of a quantum network
• Two-dimensional quantum rings with oscillating spin-orbit interaction strength: A wave function picture
• Spin polarization control by electric means: proposal for a spin diode
• Optical and electronic properties of colloidal CdSe Quantum Rings
• Electron transfer through a multiterminal quantum ring: magnetic forces and elastic scattering effects
• Quantum Transport in an Array of Mesoscopic Rings: Effect of Interface Geometry
• Singlet-triplet avoided crossings and effective $g$ factor versus spatial orientation of spin-orbit-coupled quantum dots
• Spin Filtering in a Nonuniform Quantum Wire with Rashba Spin-Orbit Interaction
• Flux driven and geometry controlled spin filtering for arbitrary spins in aperiodic quantum networks
• Time dependent configuration interaction simulations of spin swap in spin orbit coupled double quantum dots
• High temperature conductance of a two-dimensional superlattice controlled by spin-orbit interaction
• Coupling of bonding and antibonding electron orbitals in double quantum dots by spin-orbit interaction
• Spin-orbit interaction controlled properties of two-dimensional superlattices: Spintronic crystals
• Local magnetic moments and electronic transport in closed loop quantum dot systems: a case of quadruple quantum dot ring at and away from equilibrium
• Spin-polarized current separator based on a fork-shaped Rashba nanostructure
• Simultaneous spin-based Boolean logic operations with re-programmable functionality
• Magnetic forces and stationary electron flow in three-terminal semiconductor quantum ring
• Magneto-transport in mesoscopic rings and cylinders: Effects of electron-electron interaction and spin-orbit coupling
• Spin polarization direction switch based on an asymmetrical quantum wire
• Oscillating spin-orbit interaction as a source of spin-polarized wave packets in two-terminal nanoscale devices
• Magnetization Transfer by a Quantum Ring Device
• Local spin polarisation of electrons in Rashba semiconductor nanowires: effects of the bound state
• Spin separation and exchange for quantum dots in the Overhauser field
• Electron transport in waveguides with spatially modulated strengths of the Rashba and Dresselhaus terms of the spin-orbit interaction