Electrically Switchable van der Waals Magnon Valves

Abstract

Van der Waals magnets have emerged as a fertile ground for the exploration of highly tunable spin physics and spin-related technology. Two-dimensional (2D) magnons in van der Waals magnets are collective excitation of spins under strong confinement. Although considerable progress has been made in understanding 2D magnons, a crucial magnon device called the van der Waals magnon valve, in which the magnon signal can be completely and repeatedly turned on and off electrically, has yet to be realized. Here we demonstrate such magnon valves based on van der Waals antiferromagnetic insulator MnPS3. By applying DC electric current through the gate electrode, we show that the second harmonic thermal magnon (SHM) signal can be tuned from positive to negative. The guaranteed zero crossing during this tuning demonstrates a complete blocking of SHM transmission, arising from the nonlinear gate dependence of the non-equilibrium magnon density in the 2D spin channel. Using the switchable magnon valves we demonstrate a magnon-based inverter. These results illustrate the potential of van der Waals anti-ferromagnets for studying highly tunable spin-wave physics and for application in magnon-base circuitry in future information technology.

arXiv comment18 pages, 4 figures

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Cited by in corpus (9)

• Spin and spin current -- From fundamentals to recent progress
• Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids
• The spin-flop transition in the quasi two dimensional antiferromagnet MnPS3 detected via thermally generated magnon transport
• Electric Field Switching of Magnon Spin Current in a Compensated Ferrimagnet
• Fundamentals and applications of Van der Waals magnets in magnon spintronics
• Ferroelectric valley valves with graphene/MoTe${}_2$ van der Waals heterostructures
• Spin Hall magnetoresistance effect from a disordered interface
• Electrical Seebeck-Contrast Observation of Magnon Hall Effect in Topological Ferromagnet Lu${}_2$V${}_2$O${}_7$/Heavy Metal Heterostructures
• Ferroelectric Switchable Topological Magnon Hall Effect in Type-I Multiferroics