Berry phase monopole engineering for high-temperature, ultrafast and low-power spin-orbit torque spintronic devices

https://phys.org/news/2024-01-berry-phase-monopole-high-temperature.html

"spin-orbit- promising alternative to spin-transfer-torque... in non-magnetic materials, spin Hall effect (SHE) key to achieving spin-orbit torque (SOT)... tantalum silicide has several Dirac band electron points near Fermi level, key to achieving large SHE containing hot spots for Berry phase... SOT efficiency of TaSi2 almost unchanged from 62 K to 288 K... upon increasing temperature further, SOT efficiency nearly doubled at 346 K... corresponding SHE similarly increased... magneto-resistive random-access memory"