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- W1970709235 abstract "Angle-resolved photoelectron spectroscopy is used for a detailed study of the electronic structure of the topological insulator Bi2Se3. Nominally stoichiometric and calcium-doped samples were investigated. The pristine surface shows the topological surface state in the bulk band gap. As time passes, the Dirac point moves to higher binding energies, indicating an increasingly strong downward bending of the bands near the surface. This time-dependent band bending is related to a contamination of the surface and can be accelerated by intentionally exposing the surface to carbon monoxide and other species. For a sufficiently strong band bending, additional states appear at the Fermi level. These are interpreted as quantised conduction band states. For large band bendings, these states are found to undergo a strong Rashba splitting. The formation of quantum well states is also observed for the valence band states. Different interpretations of similar data are also discussed." @default.
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- W1970709235 date "2012-11-15" @default.
- W1970709235 modified "2023-09-23" @default.
- W1970709235 title "The electronic structure of clean and adsorbate-covered Bi<sub>2</sub>Se<sub>3</sub>: an angle-resolved photoemission study" @default.
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- W1970709235 doi "https://doi.org/10.1088/0268-1242/27/12/124001" @default.
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