5 papers
Transverse and Unidirectional Spin Pumping
Ping Li, Chengyuan Cai, Tao Yu
Conventional spin pumping, driven by magnetization dynamics, is longitudinal since the pumped spin current flows normal to the interface between the ferromagnet and the conductor.…
Evanescent Orbital Pumping by Magnetization Dynamics Free of Spin-Orbit Coupling
Chengyuan Cai, Hanchen Wang, Tao Yu
Converting magnetization spin to orbital current often relies on strong spin-orbit interaction that may cause additional angular momentum dissipation. We report that coherent magne…
Directional entanglement of spin-orbit locked nitrogen-vacancy centers by magnons
Zhiping Xue, Ji Zou, Chengyuan Cai +2
We address that the stray magnetic field emitted by the excited quantum states of the nitrogen-vacancy (NV) centers is spin-momentum locked, such that the spin transfer to nearby f…
Spin Radiation of Electrons, Excitons, and Phonons
Chengyuan Cai, Tao Yu
In the celebrated Stern-Gerlach experiment an inhomogeneous static magnetic field separates a beam of charge-neutral atoms with opposite spins, thereby driving a ``spin current" no…
Spin-orbit locking of magnons with localized microwave fields
Chengyuan Cai, Zubiao Zhang, Ji Zou +2
We address the photonic spin-orbit coupling known from nano-optics and plasmonics in the microwave regime. The spin and momentum of microwaves emitted by…