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arXiv · 1304.4878

Transmission of phase information between electrons and holes in graphene

Atikur Rahman·Janice Wynn Guikema·Soo Hyung Lee·Nina Markovic
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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 Aharonov-Bohm effect and Klein tunneling.

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Atikur Rahman, Janice Wynn Guikema, Soo Hyung Lee, Nina Markovic. 2013-04-16. Transmission of phase information between electrons and holes in graphene. https://doi.org/10.1103/physrevb.87.081401

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