title: Majorana fermions from Landau quantization in a superconductor and topological-insulator hybrid structure.
abstract: We show that the interplay of cyclotron motion and Andreev reflection experienced by massless-Dirac-like charge carriers in topological-insulator surface states generates a Majorana-particle excitation. On the basis of an envelope-function description of the Dirac-Andreev edge states, we discuss the kinematic properties of the Majorana mode and find them to be tunable by changing the superconductor's chemical potential and/or the magnitude of the perpendicular magnetic field. Our proposal opens up new possibilities for studying Majorana fermions in a controllable setup.
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
authors.forename: Rakesh P
authors.initials: RP
authors.lastname: Tiwari
authors.forename: U
authors.initials: U
authors.lastname: Zülicke
authors.forename: C
authors.initials: C
authors.lastname: Bruder