Spin transport through a quantum network: Effects of Rashba spin orbit interaction and Aharonov-Bohm flux

Abstract

We address spin dependent transport through an array of diamonds in the presence of Rashba spin-orbit (SO) interaction where each diamond plaquette is penetrated by an Aharonov-Bohm (AB) flux $\varphi$. The diamond chain is attached symmetrically to two semi-infinite one-dimensional non-magnetic metallic leads. We adopt a single particle tight-binding Hamiltonian to describe the system and study spin transport using Green's function formalism. After presenting an analytical method for the energy dispersion relation of an infinite diamond chain in the presence of Rashba SO interaction, we study numerically the conductance-energy characteristics together with the density of states of a finite sized diamond network. At the typical flux $\varphi ={\varphi }_0/2$, a delocalizing effect is observed in the presence of Rashba SO interaction, and, depending on the specific choices of SO interaction strength and AB flux the quantum network can be used as a spin filter. Our analysis may be inspiring in designing spintronic devices.

12 pages, 12 figures

References in corpus (20)

• Ballistic spin-polarized transport and Rashba spin precession in semiconductor nanowires
• Interaction induced delocalisation for two particles in a periodic potential
• Pairing of Cooper Pairs in a Fully Frustrated Josephson Junction Chain
• How to escape Aharonov-Bohm cages ?
• Pure spin currents and associated electrical voltage
• Bias-controllable intrinsic spin polarization in a quantum dot
• Non-Abelian gauge field theory of the spin-orbit interaction and a perfect spin filter
• Spontaneous spin-polarized current in a nonuniform Rashba interaction system
• Gate-controllable spin-battery
• Networks of quantum nanorings: programmable spintronic devices
• Tunable pure spin currents in a triple-quantum-dot ring
• Exact many-electron ground states on the diamond Hubbard chain
• Transmission through quantum networks
• Rashba effect in quantum networks
• Spin filtering by a periodic nanospintronic devices
• Spin filtering due to quantum interference in periodic mesoscopic networks
• Stability of spintronic devices based on quantum ring networks
• Exact many-electron ground states on diamond and triangle Hubbard chains
• Flux induced semiconducting behavior of a quantum network
• Numerical simulations of a ballistic spin interferometer with the Rashba spin-orbital interaction

Cited by in corpus (11)

• Curvature effect on spin polarization in a three-terminal geometry in presence of Rashba spin-orbit interaction
• Characteristics of persistent spin current components in a quasi-periodic Fibonacci ring with spin-orbit interactions: Prediction of spin-orbit coupling and on-site energy
• Interface sensitivity on spin transport through a three-terminal graphene nanoribbon
• Unconventional charge and spin dependent transport properties of a graphene nanoribbon with line-disorder
• Spin-dependent Seebeck Effect in Aharonov-Bohm Rings with Rashba and Dresselhaus Spin-orbit Interactions
• Selective spin transport through a quantum heterostructure: Transfer matrix method
• Local magnetic moments and electronic transport in closed loop quantum dot systems: a case of quadruple quantum dot ring at and away from equilibrium
• Externally controlled selective spin transfer through a two-terminal bridge setup
• Spin filtering and switching action in a diamond network with magnetic-nonmagnetic atomic distribution
• Controlling spin without magnetic fields -- the Bloch-Rashba rotator
• Magneto-transport in mesoscopic rings and cylinders: Effects of electron-electron interaction and spin-orbit coupling