Abstract
We demonstrate the use of a quantum transport model to study heavily graded graphene junctions in the quantum Hall regime. A combination of interface roughness and delta function disorder potential allows us to compare experimental results on different devices from the literature. We find that wide junctions suppress mixing of Landau levels. Our simulations spatially resolve carrier transport in the device, revealing separation of higher order Landau levels in strongly graded junctions, which suppresses mixing.
- Received 3 August 2016
- Revised 27 September 2016
DOI:https://doi.org/10.1103/PhysRevB.94.165312
©2016 American Physical Society