[Tu-P] Quantum Hall effect, fractional quantum Hall effect

[Tu-P-101] Pi/2 Phase Change Effect in Phonon-induced Resistance Oscillations traversing the Sound Barrier

Zitong Wang¹, Michael Hilke¹, Norman Fong², 〇David Guy Austing^1,2, Sergei Studenikin², Ken West³, Loren Pfeiffer³ (1. McGill University (Canada), 2. National Research Council of Canada (Canada), 3. Princeton University (USA))

We study phonon-induced resistance oscillations (PIROs) in a Hall bar made from an ultra-high mobility GaAs/AlGaAs quantum well structure at high applied DC current when the drift velocity can exceed the acoustic phonon velocity. A pi/2 phase change effect is observed in PIROs transitioning from the “subsonic” to the “supersonic” regime.