Evidence of Spin-Filtering in Quantum Constrictions with Spin-Orbit Interaction

Abstract

A new type of blockade effect - spin-orbit blockade (SOB) - is found in the conduction of a quantum dot (QD) made of a material with spin-orbit interaction. The blockade arises from spin-filtering effect in a quantum point contact (QPC), which is a component of the QD. Hence the appearance of the blockade itself evidences the spin-filtering effect in the QPC. The lower bound of filtering efficiency is estimated to be above 80%.

4 pages, 4 figures

References in corpus (2)

• Spin filtering by a periodic nanospintronic devices
• Spin-polarized electric currents in quantum transport through tubular two-dimensional electron gases

Cited by in corpus (6)

• Spin filtering in a Rashba-Dresselhaus-Aharonov-Bohm double-dot interferometer
• Real-time dynamics of spin-dependent transport through a double-quantum-dot Aharonov-Bohm interferometer with spin-orbit interaction
• Signatures of spin-orbit coupling in scanning gate conductance images of electron flow from quantum point contacts
• Spin current source based on a quantum point contact with local spin-orbit interaction
• Transconductance and effective Landé factors for quantum point contacts: spin-orbit coupling and interaction effects
• Dependence of the 0.5(2e2/h) conductance plateau on the aspect ratio of InAs quantum point contacts with in-plane side gates