Different views on the electronic structure of nanoscale graphene: aromatic molecule versus quantum dot
Please always quote using this URN: urn:nbn:de:bvb:20-opus-130184
- Graphene's peculiar electronic band structure makes it of interest for new electronic and spintronic approaches. However, potential applications suffer from quantization effects when the spatial extension reaches the nanoscale. We show by photoelectron spectroscopy on nanoscaled model systems (disc-shaped, planar polyacenes) that the two-dimensional band structure is transformed into discrete states which follow the momentum dependence of the graphene Bloch states. Based on a simple model of quantum wells, we show how the band structure ofGraphene's peculiar electronic band structure makes it of interest for new electronic and spintronic approaches. However, potential applications suffer from quantization effects when the spatial extension reaches the nanoscale. We show by photoelectron spectroscopy on nanoscaled model systems (disc-shaped, planar polyacenes) that the two-dimensional band structure is transformed into discrete states which follow the momentum dependence of the graphene Bloch states. Based on a simple model of quantum wells, we show how the band structure of graphene emerges from localized states, and we compare this result with ab initio calculations which describe the orbital structure.…
Author: | M. Wiessner, N. S. Rodriguez Lastra, J. Ziroff, F. Forster, P. Puschnig, L. Dössel, K. Müllen, A. Schöll, F. Reinert |
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URN: | urn:nbn:de:bvb:20-opus-130184 |
Document Type: | Journal article |
Faculties: | Fakultät für Physik und Astronomie / Physikalisches Institut |
Language: | English |
Parent Title (English): | New Journal of Physics |
Year of Completion: | 2012 |
Volume: | 14 |
Issue: | 113008 |
Pagenumber: | 12 |
Source: | New Journal of Physics 14 (2012) 113008 (12pp). doi:10.1088/1367-2630/14/11/113008 |
DOI: | https://doi.org/10.1088/1367-2630/14/11/113008 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Tag: | Ag(111); confinement; coronene; energy; films; nanographenes; photoemission; states; vicinal surfaces; well |
Release Date: | 2016/11/28 |
Licence (German): | CC BY-NC-SA: Creative-Commons-Lizenz: Namensnennung, Nicht kommerziell, Weitergabe unter gleichen Bedingungen |