Photon Assisted Tunneling in Strong Microwave Cavity within Double Quantum Dots in Semiconducting Nanotubes

Abstract

We have studied strong microwave cavity within quantum dots in semiconductor carbon nanotubes. In carbon nanotubes the graphene related material with strong spin orbit coupling due to curvature of the carbon plane was found. We have considered detection of photon assisted tunneling involving spin flips and intervalley transitions. It was based on the time dependent configuration interaction approach for system of several carriers within tight binding approach. It was found that for system in which the charge transport was blocked by the Pauli blockade the Landau-Zener-Stueckelberg pattern contained separated lines corresponding to the spin or valley flips accompanied the electron hopping. We have considered unipolar quantum dots confining holes or electrons for systems in which phonon induced charge transition from the ground state to the excited state was allowed or blocked by the Pauli exclusion principle. It was found that the Landau-Zener-Stuecklberg pattern was reproduced informer case and non-degenerate triplet like spin valley polarized state was observed. The Landau-Zener-Stueckelberg interference pattern was utilized for the study of the dephasing process in double quantum dots including the spin coherence as well as for sensitive residual radiation defectors, charge and spin pumping. The phonon assisted and Landau-Zener-Stueckelberg interference was found in quantum dots for semiconducting carbon nanotubes. The nanotube was suspended above the electrostatic gates and produced a double quantum dot confining potential. The obtained results were found in good agreement with previously obtained results.