Strain flips Hall signal in altermagnetic manganese telluride, suggesting a path to practical spintronics‎

Time-reversal symmetry is an exotic behavior found in systems whose internal physics looks different when running forward versus backward in time. For some time, physicists have searched for this behavior in systems with almost no overall magnetization. Such phases are highly prized for spintronics, where information is carried using the quantum spins of electrons.