Topological Insulators for Novel Device Applications
Technical Report,05 Aug 2013,04 Aug 2016
North Carolina State University Raleigh United States
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This research program theoretically exploited unique characteristics of the topological insulator based structures for highly functional devices for room temperature operation. Utilizing the spin-momentum interlocked nature originating from strong spin-orbit coupling in such materials, the key focus was to achieve electrical control of both degrees of freedom for integration of electronics and magnetics into a single nanoscale system. A number of innovative new concepts were put forth by judiciously employing hybrid structures formed with magnetic materials. Specific applications were pursued in three different areas multifunctional chargespin current modulation, nonvolatile magnetic switching, and high sensitivity THzfar infrared detection. The investigation encompassed both analysis of fundamental properties of topological insulators and the device modeling. While the basic operating principles of the envisioned devices were explored with the development of physical models, numerical modeling was also adopted to establish concrete designs as well as realistic estimates of performance specifications. The obtained results are expected to have significant potential impacts on room-temperature multi-functional spintronics, integration of magnetism with nanoelectronics, and far infrared sensing technologies.
- Electrical and Electronic Equipment