Interplay of topological surface and bulk electronic states in Bi2Se3
| Autor: | S. D. Mahanti, Duck Young Chung, Mercouri G. Kanatzidis, Megan Romanowich, Stuart Tessmer, Mal Soon Lee |
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| Rok vydání: | 2013 |
| Předmět: |
Physics
Surface (mathematics) Condensed matter physics Scattering 02 engineering and technology Electronic structure 021001 nanoscience & nanotechnology Condensed Matter Physics Topology 01 natural sciences Electronic Optical and Magnetic Materials law.invention law Topological insulator 0103 physical sciences Physics::Atomic and Molecular Clusters Topological order Scanning tunneling microscope 010306 general physics 0210 nano-technology Electronic band structure Surface states |
| Zdroj: | Physical Review B. 87 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.87.085310 |
| Popis: | In this paper we present scanning tunneling microscopy density-of-states measurements and electronic structure calculations of the topological insulator Bi${}_{2}$Se${}_{3}$. The measurements show significant background states in addition to the expected Dirac cone. Density-functional calculations using a slab model and analysis of the partial density of states show that the background is consistent with bulklike states with small amplitudes at the surface. The topological surface states coexist with bulklike states in the valence band, appearing as a shoulder in the projected band structure. These results strongly support the picture suggested by recent scattering experiments of the quantum interference of topological and bulklike surface states. |
| Databáze: | OpenAIRE |
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