Abstract
We present transport measurements on a lateral junction in an inverted double quantum well at zero and nonzero perpendicular magnetic fields. At a zero magnetic field, the junction exhibits diodelike behavior in accordance with the presence of a hybridization gap. With an increasing magnetic field, we explore the quantum Hall regime where spin-polarized edge states with the same chirality are either reflected or transmitted at the junction, whereas those of opposite chirality undergo a mixing process, leading to full equilibration along the width of the junction independent of spin. These results lay the foundations for using junctions in double quantum wells to probe the transition between the topological quantum spin Hall and quantum Hall states.
- Received 24 March 2017
DOI:https://doi.org/10.1103/PhysRevLett.118.206801
© 2017 American Physical Society