Science Daily January 5, 2022
Topological materials are promising for transistors. However, it is difficult to turn off the dissipationless flow of electrons in topological materials. A team of researchers in the US (Harvard University, Wellesley College) has numerically demonstrated a topological logic gate for ultrasound by exploiting the large phase space of accidental degeneracies in a honeycomb lattice. They found that a degeneracy can be broken by six physical parameters and showed how to tune these parameters to create a phononic switch that transitions between a topological waveguide and a trivial insulator by ultrasonic heating. According to the researchers, their design scheme is directly applicable to photonic crystals and may guide the design of future electronic topological transistors…read more. TECHNICAL ARTICLE
Designing a temperature-controlled topological switch. Credit: Phys. Rev. Lett. 128, 015501, 5 January 2022Â