Tunable Nuclear Polarization with External Stationary Fields in Weakly Coupled Double Quantum Dots

Hyperfine interaction in double quantum dots releases spin blockade allowing the flux of electronic current. This interaction gives rise to a feedback mechanism between the spins of the electrons transported through the device and nuclei spins. In this letter, we analyze the role played by an external dc voltage in the dynamical nuclear polarization induced in a double quantum dot by hyperfine interaction. Accordingly, we show that the nuclear polarization in the quantum dots can be tuned by a source-drain external voltage and an external magnetic field.

Tunable Nuclear Polarization with External Stationary Fields in Weakly Coupled Double Quantum Dots Articles