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Area of Science:

  • Condensed matter physics
  • Spintronics
  • Quantum information science

Background:

  • Next-generation information processing seeks alternatives to electrons for low-dissipation carriers.
  • Magnons, quasiparticles of spin waves in magnetic materials, are promising candidates.

Purpose of the Study:

  • To demonstrate magnon-by-magnon control for all-magnon information systems.
  • To develop a functional magnon transistor.

Main Methods:

  • Fabrication of a three-terminal device from an electrically insulating magnetic material.
  • Utilizing a magnonic crystal to enhance nonlinear magnon-magnon interactions.

Main Results:

  • Successful realization of magnon-by-magnon control.
  • Demonstration of a magnon transistor with significant gate control.
  • Achieved a three-orders-of-magnitude decrease in magnon current density via gate injection.

Conclusions:

  • Proof of concept for a magnon transistor.
  • Highlights the potential of magnons for low-dissipation information processing.
  • Opens avenues for novel magnonic circuits and devices.