Detection of spin polarized currents in quantum point contacts via transverse electron focusing

Abstract

It has been predicted recently that an electron beam can be polarized when it flows adiabatically through a quantum point contact in a system with spin-orbit interaction. Here, we show that a simple transverse electron focusing setup can be used to detect such polarized current. It uses the amplitude's asymmetry of the spin-split transverse electron focusing peak to extract information about the electron's spin polarization. On the other hand, and depending on the quantum point contact geometry, including this one-body effect can be important when using the focusing setup to study many-body effects in quantum point contacts.

arXiv comment5 pages, 5 figures

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Cited by in corpus (21)

• Anomalous Josephson Current in Junctions with Spin-Polarizing Quantum Point Contacts
• Spin-orbit induced chirality of Andreev states in Josephson junctions
• Filtering and analyzing mobile qubit information via Rashba-Dresselhaus-Aharonov-Bohm interferometers
• Anomalous spin-resolved point-contact transmission of holes due to cubic Rashba spin-orbit coupling
• Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe${}_2$
• Magnetic focusing of charge carriers from spin-split bands: Semiclassics of a Zitterbewegung effect
• Cyclotron motion and magnetic focusing in semiconductor quantum wells with spin-orbit coupling
• Lateral spin-orbit interaction and spin polarization in quantum point contacts
• Magnetic breakdown of cyclotron orbits in systems with Rashba and Dresselhaus spin-orbit coupling
• Direct observation of exchange-driven spin interactions in one-dimensional system
• Magnetic Focussing of Electrons and Holes in the presence of spin orbit interactions
• Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing
• Coherent Spin Amplification Using a Beam Splitter
• Spin-current quantization in a quantum point contact with spin-orbit interaction
• Interference effects and Huygens' principle in transverse magnetic focusing of electrons and holes
• Spin-Orbit Based Coherent Spin Ratchets
• Interference in spin-orbit coupled transverse magnetic focusing; emergent phase due to in-plane magnetic fields
• Influence of device geometry and imperfections on the interpretation of transverse magnetic focusing experiments
• Complex-band-structure eigenvalue method adapted to Floquet systems: topological superconducting wires as a case study
• Imaging spin-resolved cyclotron trajectories in the InSb two-dimensional electron gas
• Imaging chiral Andreev reflection in the presence of Rashba spin-orbit coupling