Anomalous spin-resolved point-contact transmission of holes due to cubic Rashba spin-orbit coupling

Abstract

Evidence is presented for the finite wave vector crossing of the two lowest one-dimensional spin-split subbands in quantum point contacts fabricated from two-dimensional hole gases with strong spin-orbit interaction. This phenomenon offers an elegant explanation for the anomalous sign of the spin polarization filtered by a point contact, as observed in magnetic focusing experiments. Anticrossing is introduced by a magnetic field parallel to the channel or an asymmetric potential transverse to it. Controlling the magnitude of the spin-splitting affords a novel mechanism for inverting the sign of the spin polarization.

4 pages, 3 figures

References in corpus (7)

• Spin relaxation and decoherence of holes in quantum dots
• Observation of a One-Dimensional Spin-Orbit Gap in a Quantum Wire
• Zeeman splitting in ballistic hole quantum wires
• Detection of spin polarized currents in quantum point contacts via transverse electron focusing
• Anisotropic modification of the effective hole $g$-factor by electrostatic confinement
• Evidence for localization and 0.7 anomaly in hole quantum point contacts
• Exchange energy and generalized polarization in the presence of spin-orbit coupling in two dimensions

Cited by in corpus (32)

• The germanium quantum information route
• Direct Rashba spin-orbit interaction in Si and Ge nanowires with different growth directions
• Recent advances in hole-spin qubits
• Generating a topological anomalous Hall effect in a non-magnetic conductor
• Strong influence of spin-orbit coupling on magnetotransport in two-dimensional hole systems
• Controlled spatial separation of spins and coherent dynamics in spin-orbit-coupled nanostructures
• Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe${}_2$
• Characterization of spin-orbit interactions of GaAs heavy holes using a quantum point contact
• Mechanisms for strong anisotropy of in-plane g-factors in hole based quantum point contacts
• Anisotropic Fermi Contour of (001) GaAs Holes in Parallel Magnetic Fields
• All electrically controlled quantum gates for single heavy hole spin qubits
• 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
• g-Factor anisotropy of hole quantum wires induced by the Rashba interaction
• Spin-dependent electron transport in waveguide with continuous shape
• Signatures of quantum mechanical Zeeman effect in classical transport due to topological properties of two-dimensional spin-3/2 holes
• Coherent Spin Amplification Using a Beam Splitter
• Rashba-coupling modelling for two-dimensional and high-order Rashba Hamiltonian for one-dimensional confined heavy holes
• An upper and lower bound to the orientation-dependent linear Rashba spin-orbit coupling of two-dimensional hole gases in semiconductor quantum wells
• Gate voltage dependent Rashba spin splitting in hole transverse magnetic focussing
• Interference effects and Huygens' principle in transverse magnetic focusing of electrons and holes
• Spin polarisation and spin dependent scattering of holes in transverse magnetic focussing
• Spin-orbit coupling and resonances in the conductance of quantum wires
• Quasiparticle velocities in 2D electron/hole liquids with spin-orbit coupling
• Coherent Electron Optics with Ballistically Coupled Quantum Point Contacts
• Understanding spin Hall effect in two-dimensional fermionic systems with generic spin-orbit interaction
• Imaging spin-resolved cyclotron trajectories in the InSb two-dimensional electron gas
• Non-linear spin filter for non-magnetic materials at zero magnetic field
• A one-dimensional spin-orbit interferometer
• Quadrupolar photovoltaic effect in the terahertz range in a two-dimensional spin-3/2 hole system
• Confinement of spin-orbit induced Dirac states in quantum point contacts