Journal
PHYSICAL REVIEW B
Volume 87, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.081401
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Funding
- NSF [DMR-1106167, 1066293]
- M. Hildred Blewett Fellowship of the American Physical Society
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1106167] Funding Source: National Science Foundation
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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. DOI: 10.1103/PhysRevB.87.081401
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