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- W1570807592 abstract "Chemical bond analysis for the topological insulator (TI) Bi2Se3 following valence bond theory and VSEPR rule is proposed and compared to that of graphene. The existence of pi-bond trimers on surface Se-layer is revealed to be responsible for the unusual 2D surface conduction found in the prototype Z2 topological insulator Bi2Se3, which shows great similarity to the ideal surface-only 2D material graphene with surface band in Dirac cone shape. The pi-bond trimers on the surface of TI form a dynamic pi-bond conjugated system of implicit chirality. Local pi-bond energy exchange in cross-bridge model is proposed responsible for the unique 2D surface conduction for topological insulator Bi2Se3, and the similar low dimensional conduction mechanism can also be identified in graphene and conductive polymers. Preliminary supporting evidence for the existence of pi-bonds is provided by the commonly assigned pi plasmon for the spectral feature near 7 eV in graphite and Bi2Se3 using electron energy-loss spectroscopy (EELS)." @default.
- W1570807592 created "2016-06-24" @default.
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- W1570807592 date "2013-07-08" @default.
- W1570807592 modified "2023-09-27" @default.
- W1570807592 title "pi-bonds in graphene and surface of topological insulator Bi2Se3" @default.
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- W1570807592 hasPublicationYear "2013" @default.
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