Spin current diode based on an electron waveguide with spin-orbit interaction

Abstract

We propose a spin current diode which can work even in a small applied bias condition (the linear-response regime). The prototypal device consists of a hornlike electron waveguide with Rashba spin-orbit interaction, which is connected to two leads with different widths. It is demonstrated that when electrons are incident from the narrow lead, the generated spin conductance fluctuates around a constant value in a wide range of incident energy. When the transport direction is reversed, the spin conductance is suppressed strongly. Such a remarkable difference arises from spin-flipped transitions caused by the spin-orbit interaction.

3 pages, 2 figures

References in corpus (8)

• Spintronics: Fundamentals and applications
• Voltage-Controlled Spin Selection in a Magnetic Resonant Tunnelling Diode
• Fano-Rashba effect in a quantum wire
• Quantum Dot as a Spin--Current Diode
• Mesoscopic Stern-Gerlach spin filter by nonuniform spin-orbit interaction
• Filtering spin with tunnel-coupled electron wave guides
• Spin Polarization at Semiconductor Point Contacts in Absence of Magnetic Field
• Spin polarization in a T-shape conductor induced by strong Rashba spin-orbit coupling

Cited by in corpus (9)

• Spin polarized current generation from quantum dots without magnetic fields
• Electric field-induced spin textures in a superlattice with Rashba and Dresselhaus spin-orbit coupling
• Multichannel effects in Rashba quantum wires
• Spin polarization control by electric means: proposal for a spin diode
• Charge and spin current in a quasi-one-dimensional quantum wire with spin-orbit coupling
• Spin-dependent electron transport in waveguide with continuous shape
• Spin-current quantization in a quantum point contact with spin-orbit interaction
• Spin-filtering and charge- and spin-switching effects in a quantum wire with periodically attached stubs
• Spin polarization direction switch based on an asymmetrical quantum wire