Electronic structure of a subnanometer wide bottom-up fabricated graphene nanoribbon: End states, band gap, and dispersion
- Angle-resolved two-photon photoemission and high-resolution electron energy loss spectroscopy are employed to derive the electronic structure of a subnanometer atomically precise quasi-one-dimensional graphene nanoribbon (GNR) on Au(111). We resolved occupied and unoccupied electronic bands including their dispersion and determined the band gap, which possesses an unexpectedly large value of 5.1 eV. Supported by density functional theory calculations for the idealized infinite polymer and finite size oligomers, an unoccupied nondispersive electronic state with an energetic position in the middle of the band gap of the GNR could be identified. This state resides at both ends of the ribbon (end state) and is only found in the finite sized systems, i.e., the oligomers.
| Author details: | C. Bronner, F. Leyssner, S. Stremlau, Manuel Martin UtechtORCiDGND, Peter SaalfrankORCiDGND, Tillmann KlamrothORCiDGND, P. Tegeder |
|---|---|
| DOI: | https://doi.org/10.1103/PhysRevB.86.085444 |
| ISSN: | 1098-0121 |
| Title of parent work (English): | Physical review : B, Condensed matter and materials physics |
| Publisher: | American Physical Society |
| Place of publishing: | College Park |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2012 |
| Publication year: | 2012 |
| Release date: | 2017/03/26 |
| Volume: | 86 |
| Issue: | 8 |
| Number of pages: | 5 |
| Funding institution: | FU Berlin through the Focus Area NanoScale; DFG through the collaborative research center [SFB 658] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
| Peer review: | Referiert |
