Interaction of magnons with plasmons in a system of antiferromagnetic insulators coupled to a superconductor microwave cavity through the interfacial exchange interaction

Abstract

A superconductor can interact with magnets through the magnetic field which is induced by the supercurrent. However, this interaction is rather weak and requires relatively large magnets to reach a sizable hybridization of microwave electromagnetic modes with magnons. The size of the device can be drastically reduced by means of the large interfacial exchange interaction between spins in a magnet and a superconductor. In the spin-orbit coupled superconductor this interaction can be transmitted to the s-wave condensate through a mixing of triplet and singlet Cooper pairs. In this paper we theoretically consider thin antiferromagnetic films, which make a spin compensated contact to a superconducting wire, which forms a cavity for Mooij-Schön plasma waves. The effective Lagrangian is derived where the interaction of these waves with magnons is taken into account. Frequencies of hybrid magnon-plasmon modes are calculated. A system of two micromagnets placed far apart are also considered and their mutual coupling through the cavity mode is calculated.

arXiv comment9 pages, 1 figure

References in corpus (29)

• Topological insulators and superconductors
• Antiferromagnetic spintronics
• Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems
• Superconducting Spintronics
• Tunable Rashba spin-orbit interaction at oxide interfaces
• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• High cooperativity coupling of electron-spin ensembles to superconducting cavities
• Coherent coupling of a superconducting flux-qubit to an electron spin ensemble in diamond
• Reply to the Comment on 'Quantum Phase Slips and Transport in Ultra-Thin Superconducting Wires'
• Strong Coupling between Microwave Photons and Nanomagnet Magnons
• Helical vortex phase in the non-centrosymmetric CePt_3Si
• Quantum Tunneling of the Order Parameter in Superconducting Nanowires
• Phase-slip flux qubits
• Macroscopic Superconducting Current through a Silicon Surface Reconstruction with Indium Adatoms: Si(111)-(R7$\times$R3)-In
• Theory of 2D superconductor with broken inversion symmetry
• Inhomogeneous LOFF phase revisited for surface superconductivity
• Two-dimensional superconducting state of monolayer Pb films grown on GaAs(110) in a strong parallel magnetic field
• Currents induced by magnetic impurities in superconductors with spin-orbit coupling
• Imaging Josephson Vortices on the Surface Superconductor Si(111)-(root7xroot3)-In using a Scanning Tunneling Microscope
• Conversion of a conventional superconductor into a topological superconductor by topological proximity effect
• Quantum Fluctuations in the Equilibrium State of a Thin Superconducting Loop
• Strong magnon-photon coupling with chip-integrated YIG in the zero-temperature limit
• Novel self-epitaxy for inducing superconductivity in the topological insulator (Bi1-xSbx)2Te3
• Fabrication of high-temperature quasi-two-dimensional superconductors at the interface of a ferroelectric Ba${}_{0.8}$Sr${}_{0.2}$TiO${}_3$ film and an insulating parent compound of La${}_2$CuO${}_4$
• Magnetoelectric coupling in superconductor-helimagnet heterostructures
• Strong coupling of Fe-Co alloy with ultralow damping to superconducting co-planar waveguide resonators
• Supercurrent vortices and Majorana zero modes induced by an inplane Zeeman field on the surface of a three-dimensional topological insulator
• Non-exponential long-range interaction of magnetic impurities in spin-orbit coupled superconductors