Fast spin exchange across a multielectron mediator

Gate-dependent spin–orbit coupling in multielectron carbon nanotubes

We here present additional theoretical analysis and experimental data supporting the conclusions in the article. First, the carbon nanotube dispersion relation including spin-orbit interaction is reviewed starting from a modified Dirac Hamiltonian, and the single-particle model used in the fitting procedure is explained. Second, tunneling spectroscopy data and the corresponding analysis used to...

designing a fast locking pll

a phase-locked loop (pll) based frequency synthesizer is an important circuit that is used in many applications, especially in communication systems such as ethernet receivers, disk drive read/write channels, digital mobile receivers, high-speed memory interfaces, system clock recovery and wireless communication system. other than requiring good signal purity such as low phase noise and low spu...

Coherent operations and screening in multielectron spin qubits.

Multielectron spin qubits are demonstrated, and performance examined by comparing coherent exchange oscillations in coupled single-electron and multielectron quantum dots, measured in the same device. Fast (>1  GHz) exchange oscillations with a quality factor Q∼15 are found for the multielectron case, compared to Q∼2 for the single-electron case, the latter consistent with experiments in the li...

Spin-Exchange optical pumping in a van

Interlayer exchange coupling across a ferroelectric barrier.

A new magnetoelectric effect is predicted originating from the interlayer exchange coupling between two ferromagnetic layers separated by an ultrathin ferroelectric barrier. It is demonstrated that ferroelectric polarization switching driven by an external electric field leads to a sizable change in the interlayer exchange coupling. The effect occurs in asymmetric ferromagnet/ferroelectric/ferr...