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- Search for Novel Spintronic Devices and Theoretical Study of the Energy Spectrum of Low-dimensional Electron Gas
Search for Novel Spintronic Devices and Theoretical Study of the Energy Spectrum of Low-dimensional Electron Gas
Toward power-saving devices
We use condensed matter theory to study materials and structures called topological insulators and skyrmions of which the topology dominates the phenomena. At the same time, we are studying to propose and realize novel spin devices using these topological insulators and skyrmions in the process.
Content of research
We are proposing spin devices that exceed the current mainstream CMOS devices in terms of performance and power, and are analyzing their performance using condensed matter theory. The main objective of this research is to create power-saving devices that provide superior performance to CMOS devices. To calculate the performance of novel spin devices, quantum field theory and relativity are used to calculate the spin conductivity and other properties. Currently, we are studying topological insulators and skyrmions. Topological insulators are bulk insulators, but spontaneous spin currents flow only on their surfaces. If successfully applied to devices, topological insulators make it possible to fabricate ultra-low power devices because the topological insulator itself is non-dissipative. Skyrmions are also a peculiar vortex generated in magnetic materials, and are expected to play the role of a switch by driving a current.
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Fig. 1 Band structure of a topological insulator
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Fig. 2 Contour plot of the electron density in Fig. 1
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Fig. 3 Calculated structure of a Neel-type skyrmion
Potential for social implementation
- ・Power-saving devices
- ・Large memory
- ・Beyond CMOS device
- ・Non-volatile memory
Appealing points to industry and local governments
Theory alone is not enough to actually create a device, so it would be great if there is a company that can work with me to realize the device that I have theoretically predicted. In such a case, I would be happy to explain the expected results based on the theoretical calculations and to talk about the path to realization, since I used to work at Sony and have performed experiments.
Inquiry about this research
