Spin polarisation and spin dependent scattering of holes in transverse magnetic focussing
arXiv:2210.03383 · doi:10.1103/PhysRevB.107.045304
Abstract
In 2D systems with a spin-orbit interaction, magnetic focussing can be used to create a spatial separation of particles with different spin. Here we measure hole magnetic focussing for two different magnitudes of the Rashba spin-orbit interaction. We find that when the Rashba spin-orbit magnitude is large there is significant attenuation of one of the focussing peaks, which is conventionally associated with a change in the spin polarisation. We instead show that in hole systems with a spin-orbit interaction, this peak suppression is due to a change in the scattering of one spin state, not a change in spin polarisation. We also show that the change in scattering length extracted from magnetic focussing is consistent with results obtained from measurements of Shubnikov-de Haas oscillations. This result suggests that scattering must be considered when relating focussing peak amplitude to spin polarisation in hole systems
References in corpus (23)
- Electrically tunable transverse magnetic focusing in graphene
- Imaging Magnetic Focusing of Coherent Electron Waves
- Spin separation in cyclotron motion
- Spontaneous spin polarization in quantum point contacts
- Detecting Spin-Polarized Currents in Ballistic Nanostructures
- Spin-orbit splitting of valence subbands in semiconductor nanostructures
- Generating a topological anomalous Hall effect in a non-magnetic conductor
- Prediction of large linear-in-k spin splitting for holes in the 2D GaAs/AlAs system
- Anomalous spin-resolved point-contact transmission of holes due to cubic Rashba spin-orbit coupling
- Fabrication and characterisation of ambipolar devices on an undoped AlGaAs/GaAs heterostructure
- Controlled spatial separation of spins and coherent dynamics in spin-orbit-coupled nanostructures
- Electrical control of the Zeeman spin splitting in two-dimensional hole systems
- Magnetic focusing of charge carriers from spin-split bands: Semiclassics of a Zitterbewegung effect
- All-electrical injection and detection of a spin polarized current using 1D conductors
- Detection and control of spin-orbit interactions in a GaAs hole quantum point contact
- Precision measurement of electron-electron scattering in GaAs/AlGaAs using transverse magnetic focusing
- Magnetic breakdown of cyclotron orbits in systems with Rashba and Dresselhaus spin-orbit coupling
- Magnetic Focussing of Electrons and Holes in the presence of spin orbit interactions
- Signatures of quantum mechanical Zeeman effect in classical transport due to topological properties of two-dimensional spin-3/2 holes
- Gate voltage dependent Rashba spin splitting in hole transverse magnetic focussing
- Interference effects and Huygens' principle in transverse magnetic focusing of electrons and holes
- Influence of device geometry and imperfections on the interpretation of transverse magnetic focusing experiments
- Interference in spin-orbit coupled transverse magnetic focusing; emergent phase due to in-plane magnetic fields