Absence of Aharonov-Bohm effect of chiral Majorana fermion edge states

Abstract

Majorana fermions in a superconductor hybrid system are charge neutral zero-energy states. For the detection of this unique feature, we propose an interferometry of a chiral Majorana edge channel, formed along the interface between a superconductor and a topological insulator under an external magnetic field. The superconductor is of a ring shape and has a Josephson junction that allows the Majorana state to enclose continuously tunable magnetic flux. Zero-bias differential electron conductance between the Majorana state and a normal lead is found to be independent of the flux at zero temperature, manifesting the Majorana feature of a charge neutral zero-energy state. In contrast, the same setup on graphene has no Majorana state and shows Aharonov-Bohm effects.

Revised version; 7 pages, 4 figures

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Cited by in corpus (9)

• Chiral Majorana fermion modes regulated by a scanning tunneling microscope tip
• Magnetic Flux Control of Chiral Majorana Edge Modes in Topological Superconductor
• Aharonov-Bohm interference as a probe of Majorana fermions
• Quantum Hall Bogoliubov Interferometer
• Non-Abelian Evolution of a Majorana Train in a Single Josephson Junction
• Neutral edge modes in a superconductor -- topological-insulator hybrid structure in a perpendicular magnetic field
• Laughlin charge pumping from interplay of chiral Dirac and chiral Majorana modes
• Shot noise from which-path detection in a chiral Majorana interferometer
• Poor-man's Majorana edge mode enabled by specular Andreev reflection