@Article{JAMS-3-3, author = {Qiao, Chen}, title = {Phonon-Assisted Spin Current in a Hybrid System with a Single Molecular Quantum Dot System Applied with ac Magnetic Fields}, journal = {Journal of Atomic and Molecular Sciences}, year = {2012}, volume = {3}, number = {3}, pages = {244--251}, abstract = {

We investigate the spin current through a molecular quantum dot (MQD) irradiated with a rotating magnetic field and an oscillating magnetic field by nonequilibrium Green's function. The rotating magnetic field rotates with the angular frequency $\omega_r$ around the $z$-axis with the tilt angle $\theta$, and the time-oscillating magnetic field is located in the z-axis with the angular frequency $\omega$. Different behaviors have been shown in the presence of electron-phonon interaction (EPI) which plays a significant role in the transport. The spin current displays asymmetric behavior as the source-drain bias $eV=0,$ novel side peaks or shoulders can be found due to the phonon absorption and emission procedure, and the negative spin current becomes stronger as the parameter $g$ increases. However, the spin currents display the same magnitude and the same oscillation behavior in the region $\mu_0B_1>3\Delta$ regardless of the parameter $g.$

}, issn = {2079-7346}, doi = {https://doi.org/10.4208/jams.062111.081811a}, url = {https://global-sci.com/article/74379/phonon-assisted-spin-current-in-a-hybrid-system-with-a-single-molecular-quantum-dot-system-applied-with-ac-magnetic-fields} }