Graphene Electronic Structure with a Drinking Methaphor (IMAGE)
Caption
Graphene electronic structure represented by the Dirac cone. Using the metaphor of a sandglass-shaped cocktail glass, the differences in the electronic structures are shown as filling of the glass by a liquid made of electrons. Applying negative voltage is equivalent to drinking, and positive voltage to filling the glass with more liquid (=electrons). The Fermi level is the maximum level where you can find electrons, while the slimmest part of the sandglass is called Dirac point. (Graphics were modified from Freepiks)
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