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, […]