Controlled spatial separation of spins and coherent dynamics in spin-orbit-coupled nanostructures
arXiv:1801.10148 · doi:10.1038/ncomms15997
Abstract
The spatial separation of electron spins followed by the control of their individual spin dynamics has recently emerged as an essential ingredient in many proposals for spin-based technologies because it would enable both of the two spin species to be simultaneously utilized, distinct from most of the current spintronic studies and technologies wherein only one spin species could be handled at a time. Here we demonstrate that the spatial spin splitting of a coherent beam of electrons can be achieved and controlled using the interplay between an external magnetic field and Rashba spin-orbit interaction in semiconductor nanostructures. The technique of transverse magnetic focusing is used to detect this spin separation. More notably, our ability to engineer the spin-orbit interactions enables us to simultaneously manipulate and probe the coherent spin dynamics of both spin species and hence their correlation, which could open a route towards spintronics and spin-based quantum information processing.
arXiv comment15 pages, 4 figures
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- Spin polarisation and spin dependent scattering of holes in transverse magnetic focussing
- 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
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- Probing the Anisotropic Fermi Surface in Tetralayer Graphene via Transverse Magnetic Focusing
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- Coherent Electron Optics with Ballistically Coupled Quantum Point Contacts
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- Spin-orbit effects at chiral surfaces
- Transverse magnetic focusing in two-dimensional hole gases
- On-chip quantum sensing of Kondo spins in a high-mobility quasi-one-dimensional nanoconstriction
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