Department of Physics Papers

Document Type

Journal Article

Date of this Version

5-28-2009

Comments

Suggested Citation:
Fu, L. and C.L. Kane. (2009). "Probing Neutral Majorana Fermion Edge Modes with Charge Transport." Physical Review Letters. 102, 216403.

© 2009 The American Physical Society
http://dx.doi.org/10.1103/PhysRevLett.102.216403.

Abstract

We propose two experiments to probe the Majorana fermion edge states that occur at a junction between a superconductor and a magnet deposited on the surface of a topological insulator. Combining two Majorana fermions into a single Dirac fermion on a magnetic domain wall allows the neutral Majorana fermions to be probed with charge transport. We will discuss a novel interferometer for Majorana fermions, which probes their Z2 phase. This setup also allows the transmission of neutral Majorana fermions through a point contact to be measured. We introduce a point contact formed by a superconducting junction and show that its transmission can be controlled by the phase difference across the junction. We discuss the feasibility of these experiments using the recently discovered topological insulator Bi2Se3.

Date Posted: 06 January 2011

This document has been peer reviewed.