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Relativistic quantum mechanics

Paradox in a pencil

The Klein paradox, which relates to the ability of relativistic particles to pass through extreme potential barriers, could be yet another of the strange quantum phenomena made accessible by the properties of graphene.

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Figure 1: The emergence of Klein tunnelling states as a consequence of the Dirac equation.

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Calogeracos, A. Paradox in a pencil. Nature Phys 2, 579–580 (2006). https://doi.org/10.1038/nphys402

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