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Transmission of phase information between electrons and holes in graphene

Atikur Rahman, Janice Wynn Guikema, Soo Hyung Lee, and Nina Marković
Phys. Rev. B 87, 081401(R) – Published 4 February 2013
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Abstract

We have studied quantum interference between electrons and holes in a split-ring gold interferometer with graphene arms, one of which contained a pn junction. The carrier type, the pn junction, and the phase of the oscillations in a magnetic field were controlled by a top gate placed over one of the arms. We observe clear Aharonov-Bohm oscillations at the Dirac point and away from it, regardless of the carrier type in each arm. We also find clear oscillations when one arm of the interferometer contains a single pn junction, allowing us to study the interplay of the Aharonov-Bohm effect and Klein tunneling.

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  • Received 23 July 2012

DOI:https://doi.org/10.1103/PhysRevB.87.081401

©2013 American Physical Society

Authors & Affiliations

Atikur Rahman, Janice Wynn Guikema, Soo Hyung Lee, and Nina Marković

  • Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA

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Issue

Vol. 87, Iss. 8 — 15 February 2013

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