Evidence for Majorana phases in the magnetoconductance of topological junctions based on two-dimensional electron gases
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Abstract
We calculate the linear conductance of a two-dimensional electron gas (2DEG)-based junction between a normal semiconductor section and a hybrid semiconductor-superconductor section, under perpendicular magnetic field. We consider two important terms often neglected in the literature, the magneto-orbital and transverse Rashba spin-orbit. The strong orbital effect due to the magnetic field yields topological phase transitions to nontrivial phases hosting Majorana modes in the hybrid section. The presence of a potential barrier at the junction interface reveals the Majorana phases as quantized plateaus of high conductance, for low values of the chemical potential. In wide junctions (or large chemical potentials) the phase transitions occur at low magnetic fields but the magnetoconductance becomes anomalous and lacks clearly quantized plateaus.
Description
Keywords
Journal Title
Conference Name
Journal ISSN
2469-9969