Emergent Spintronics Research Team

Creating the Principles of Future Quantum Devices with Spintronics

Quantum spintronics provides essential guiding principles for achieving innovative devices. It explores the physics of the interaction between the spin degrees of freedom of electrons and the diverse ordering in condensed matter, bridging the way to practical applications. Spin dynamics exhibiting strong nonlinearity due to the shape effects of nano magnets demonstrate exotic responses such as squeezing and nonlinear bifurcation phenomena, which can be controlled by spin and electric currents. Research on prominent nonlinear parametric processes in nano magnets is conducted, paving the way for nonlinear and quantum regimes in collective spin excitations. In particular, quantum squeezed magnons (spin waves) associated with strong nonlinearity and high coherence serve as promising magnetic quantum information carriers, offering potential applications in quantum information electronics and quantum sensors (e.g., magnetic field sensors, thermal and thermal fluctuation sensors). Furthermore, thermally squeezed magnons hold promise for applications in thermal control and power generation devices. Additionally, beyond ferromagnetic order, various ordered phases exist in condensed matter, and their coupling with electric and spin currents can yield exciting results. Leveraging the spintronics measurement techniques in our group, we also explore new realms of material science that this coupling can bring.

Parametron in nano magnets.