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Figure 3 | Nano Convergence

Figure 3

From: Surface effects on electronic transport of 2D chalcogenide thin films and nanostructures

Figure 3

Band structure measurements of Bi 2 Se 3 from angle-resolved photoemission spectroscopy. (A) shows the band structure of freshly cleaved Bi2Se3 surface. The surface state is clearly visible. (B) Band structure of the same surface, after left in vacuum for three hours. The Dirac point shifted down. In addition, a sharp rim is observed around the conduction band edge after three hours. This indicates emergence of a trivial 2D electron gas. Reprinted with permission from Ref. 72.

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