Antiresonance in the spin current through a quantum dot induced by electron-phonon interaction
| Autor: | Li-Ling Zhou, Yi-Gao Wang, Xue-Yun Zhou, Z. Y. Zeng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Condensed matter physics Phonon 02 engineering and technology 021001 nanoscience & nanotechnology Antiresonance 01 natural sciences Omega Magnetic field Quantum dot 0103 physical sciences Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Quantum tunnelling Rabi frequency Spin-½ |
| Zdroj: | Physical Review B. 102 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | We investigate the nonequilibrium spin transport through an electron-phonon coupled quantum dot, on which an external magnetic field ${B}_{0}$ and a rotating magnetic field $[{B}_{1}cos({\ensuremath{\omega}}_{1}t),{B}_{1}sin({\ensuremath{\omega}}_{1}t)]$ are applied. It is found that the spin current is significantly affected by the destructive interference between electron tunneling waves through different spin channels. As a result, dips appear in the spin current as a function of ${\ensuremath{\omega}}_{1}$ every time the Rabi frequency is tuned to be integral numbers of the phonon frequency. It is also found that the main spin current peak does not always exist at the resonant rotating frequency ${\ensuremath{\omega}}_{1}=g{\ensuremath{\mu}}_{B}{B}_{0}$. |
| Databáze: | OpenAIRE |
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