Nonlinear Spin Currents

Abstract

The cavity mediated spin current between two ferrite samples has been reported by Bai et. al. [Phys. Rev. Lett. 118, 217201 (2017)]. This experiment was done in the linear regime of the interaction in the presence of external drive. In the current paper we develop a theory for the spin current in the nonlinear domain where the external drive is strong so that one needs to include the Kerr nonlinearity of the ferrite materials. In this manner the nonlinear polaritons are created and one can reach both bistable and multistable behavior of the spin current. The system is driven into a far from equilibrium steady state which is determined by the details of driving field and various interactions. We present a variety of steady state results for the spin current. A spectroscopic detection of the nonlinear spin current is developed, revealing the key properties of the nonlinear polaritons. The transmission of a weak probe is used to obtain quantitative information on the multistable behavior of the spin current. The results and methods that we present are quite generic and can be used in many other contexts where cavities are used to transfer information from one system to another, e.g., two different molecular systems.

8 pages, 8 figures

References in corpus (29)

• Strongly coupled magnons and cavity microwave photons
• Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
• High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids
• Long distance transport of magnon spin information in a magnetic insulator at room temperature
• Magnon-photon-phonon entanglement in cavity magnomechanics
• Bistability of Cavity Magnon Polaritons
• Spin Pumping in Electrodynamically Coupled Magnon-Photon Systems
• Cavity optomagnonics with spin-orbit coupled photons
• Optomagnonic whispering gallery microresonators
• Strong-field interactions between a nanomagnet and a photonic cavity
• Observation of multi-component atomic Schrödinger cat states of up to 20 qubits
• Resolving magnon number states in quantum magnonics
• Level Attraction Due to Dissipative Magnon-Photon Coupling
• Cavity quantum electrodynamics with ferromagnetic magnons in a small yttrium-iron-garnet sphere
• Triple-resonant Brillouin light scattering in magneto-optical cavities
• Ultra-High Cooperativity Interactions between Magnons and Resonant Photons in a YIG sphere
• Quantum entanglement between two magnon modes via Kerr nonlinearity
• Emitters of $N$-photon bundles
• Superstrong Coupling of a Microwave Cavity to YIG Magnons
• Cavity mediated manipulation of distant spin currents using cavity-magnon-polariton
• Dissipative couplings in cavity magnonics
• $N$-phonon bundle emission via the anti-Stokes process
• Cavity mediated dissipative coupling of distant magnetic moments: theory and experiment
• Optical manipulation of a magnon-photon hybrid system
• Quantum fluctuations in Fröhlich condensate of molecular vibrations driven far from equilibrium
• Hyperradiance from collective behavior of coherently driven atoms
• Curl flux, coherence, and population landscape of molecular systems: Nonequilibrium quantum steady state, energy (charge) transport, and thermodynamics
• Low loss spin wave resonances in organic-based ferrimagnet vanadium tetracyanoethylene thin films
• Collective Radiance Effects in the Ultrastrong Coupling Regime

Cited by in corpus (16)

• Quantum magnonics: when magnon spintronics meets quantum information science
• Long-Time Memory and Ternary Logic Gate Using a Multistable Cavity Magnonic System
• Enhanced sensing of weak anharmonicities through coherences in dissipatively coupled anti-PT symmetric systems
• Strong Long-Range Spin-Spin Coupling via a Kerr Magnon Interface
• Parity-symmetry-breaking quantum phase transition via parametric drive in a cavity magnonic system
• Detection sensitivity enhancement of magnon Kerr nonlinearity in cavity magnonics induced by coherent perfect absorption
• Switchable Superradiant Phase Transition with Kerr Magnons
• Ultralow threshold bistability and generation of long-lived mode in a dissipatively coupled nonlinear system: application to magnonics
• Bistability in dissipatively coupled cavity magnonics
• Cavity mediated level attraction and repulsion between magnons
• Anti-PT-symmetry-enhanced interconversion between microwave and optical fields
• Chiral coupling between a ferromagnetic magnon and a superconducting qubit
• Nonreciprocal quantum phase transition in cavity magnonics
• Explosive growth of bistability in a cavity magnonic system
• Light-induced Nonlinear Spin Hall Current in Single-layer WTe${}_2$
• Nonreciprocal superradiant quantum phase transition induced by the magnon Kerr effect