Quantum Interferences in Monolayer Graphene PN Junctions
ORAL
Abstract
Ballistic Dirac-Fermion transport across gate-defined PN junctions exhibits strong dependence on incident angle due to the linear dispersion relationship. Multiple experiments have been performed utilizing the angle-dependence of Klein tunneling, in which novel electron-optics concepts including electron collimation [1] and Veselago lensing [2][3] have been demonstrated. Here we demonstrate preliminary experimental observations of quantum interferences based on these concepts. Preliminary transport data across carefully-engineered PN junctions will be presented and quantitative analysis based on Klein-tunneling probability will also be discussed.
[1] Ke Wang et al, Proc. Nat. Acad. Sci. 116, 6575-6579 (2019).
[2] Shaowen Chen et al, Science 353, 1522-1525 (2016).
[3] Gil-Ho Lee et al, Nature Physics 11, 925–929 (2015).
[1] Ke Wang et al, Proc. Nat. Acad. Sci. 116, 6575-6579 (2019).
[2] Shaowen Chen et al, Science 353, 1522-1525 (2016).
[3] Gil-Ho Lee et al, Nature Physics 11, 925–929 (2015).
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Presenters
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Xi Zhang
University of Minnesota
Authors
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Xi Zhang
University of Minnesota
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Kan-Ting Tsai
University of Minnesota
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Yujie Luo
University of Minnesota
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Ke Wang
University of Minnesota