Macroscopic transverse drift of long current-induced spin coherence in two-dimensional electron gases
| Autor: | Gerson J. Ferreira, A. K. Bakarov, S. Ullah, F. G. G. Hernandez, N. M. Kawahala, G. M. Gusev |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Physics Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Mean free path Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Electron 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Transverse plane Electric field 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0210 nano-technology Fermi gas Quantum well Coherence (physics) |
| DOI: | 10.48550/arxiv.1605.06854 |
| Popis: | We imaged the transport of current-induced spin coherence in a two-dimensional electron gas confined in a triple quantum well. Nonlocal Kerr rotation measurements, based on the optical resonant amplification of the electrically-induced polarization, revealed a large spatial variation of the electron g factor and the efficient generation of a current controlled spin-orbit field in a macroscopic Hall bar device. We observed coherence times in the nanoseconds range transported beyond half-millimeter distances in a direction transverse to the applied electric field. The measured long spin transport length can be explained by two material properties: large mean free path for charge diffusion in clean systems and enhanced spin-orbit coefficients in the triple well. Comment: 12 pages, 13 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|