Generation and Detection of Spin Currents in Semiconductor Nanostructures with Strong Spin-Orbit Interaction
arXiv:1409.4045 · doi:10.1103/PhysRevLett.114.206601
Abstract
Storing, transmitting, and manipulating information using the electron spin resides at the heart of spintronics. Fundamental for future spintronics applications is the ability to control spin currents in solid state systems. Among the different platforms proposed so far, semiconductors with strong spin-orbit interaction are especially attractive as they promise fast and scalable spin control with all-electrical protocols. Here we demonstrate both the generation and measurement of pure spin currents in semiconductor nanostructures. Generation is purely electrical and mediated by the spin dynamics in materials with a strong spin-orbit field. Measurement is accomplished using a spin-to-charge conversion technique, based on the magnetic field symmetry of easily measurable electrical quantities. Calibrating the spin-to-charge conversion via the conductance of a quantum point contact, we quantitatively measure the mesoscopic spin Hall effect in a multiterminal GaAs dot. We report spin currents of 174 pA, corresponding to a spin Hall angle of 34%.
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- Geometric Correlations and Breakdown of Mesoscopic Universality in Spin Transport
- Mesoscopic fluctuations of spin currents
- Non-linear spin to charge conversion in mesoscopic structures
Cited by in corpus (13)
- Spin-Seebeck effect and spin polarization in a multiple quantum dot molecule
- Record-quality GaAs two-dimensional hole systems
- Conductance Peak Density in Nanowires
- Spin-to-Charge Conversion in 2D Electron Gas and Single-layer Graphene Devices
- Full Counting Statistics of Spin-Flip/Conserving Charge Transitions in Pauli-Spin Blockade
- Tuning of Fermi Contour Anisotropy in GaAs (001) 2D Holes via Strain
- Spin currents of exciton polaritons in a microcavity with (110)-oriented quantum well
- Ultraclean two-dimensional hole systems with mobilities exceeding 10 cm/Vs
- Conductance quantization and shot noise of a double-layer quantum point contact
- Cross-section geometry effects in the subband structure and spin-related properties of a HgTe/CdTe nanowire
- Non-linear spin filter for non-magnetic materials at zero magnetic field
- Manipulating Quantum Spins by a Spin-Polarized Current: An Approach Based Upon PT-Symmetric Quantum Mechanics
- Nested Fermi surfaces and correlated electronic phases in hole-doped semiconductor quantum wells