All-electric single-electron spin-to-charge conversion
| Autor: | S. Bednarek, J. Pawłowski, M. Górski, G. Skowron |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Coupling Condensed Matter - Mesoscale and Nanoscale Physics Nanowire FOS: Physical sciences Charge (physics) 02 engineering and technology Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Quantum dot Electric field Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010306 general physics 0210 nano-technology Ultrashort pulse Voltage |
| Zdroj: | Physical Review B. 98 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | We examine spin-dependent displacement of a single electron, resulting in separation and relocation of the electron wavefunction components, and thus charge parts, corresponding to opposite spins. This separation is induced by a pulse of an electric field which generates varying Rashba type spin-orbit coupling. This mechanism is next implemented in a nanodevice based on a gated quantum dot defined within a quantum nanowire. The electric field pulse is generated by ultrafast changes of voltages, of the order of several hundred mV, applied to nearby gates. The device is modeled realistically with appropriate material parameters and voltages applied to the gates, yielding an accurate confinement potential and Rashba coupling. At the end, we propose a spin-to-charge conversion device, which with an additional charge detector will allow for electron spin state measurement. Comment: 7 pages, 7 figures |
| Databáze: | OpenAIRE |
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