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• W2021741155 abstract "We propose the implementation of an electronic Veselago lens on the conducting surface of a three-dimensional topological insulator (such as ${text{Bi}}_{2}{text{Te}}_{3}$). The negative refraction needed for such a flat lens results from the sign change in the curvature of the Fermi surface, changing from a circular to a snowflakelike shape across a sufficiently large electrostatic potential step. No interband transition (as in graphene) is needed. For this reason, and because the topological insulator provides protection against backscattering, the potential step is able to focus a broad range of incident angles. We calculate the quantum interference pattern produced by a point source, generalizing the analogous optical calculation to include the effect of a noncircular Fermi surface (having a nonzero conic constant)." @default.
• W2021741155 created "2016-06-24" @default.
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• W2021741155 date "2010-09-13" @default.
• W2021741155 modified "2023-09-27" @default.
• W2021741155 title "Flat-lens focusing of electrons on the surface of a topological insulator" @default.
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• W2021741155 doi "https://doi.org/10.1103/physrevb.82.125423" @default.
• W2021741155 hasPublicationYear "2010" @default.
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