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Calendar of Physics Talks Vienna
| Graphene: two-dimensional massless Dirac Fermions |
| Speaker: | Florian Libisch (TU Wien ) |
| Abstract: | Graphene, a honeycomb-lattice of carbon atoms, has attracted considerable attention since its first experimental realization in 2004. In particular, the linear dispersion relation near the Fermi energy connects the dynamics of electrons in graphene to the ultrarelativistic Dirac equation. We discuss the implications and limitations of this analogy: we compare predictions based on the Dirac picture (e.g. Klein tunneling or suppressed backscattering) to a tight-binding simulation of realistic graphene quantum dots. In particular we study the influence of confinement and lattice defects on the electronic structure of graphene-based nanodevices. We find that the Dirac properties of graphene are very sensitive to breaking of the sublattice symmetry, in particular at the edges of the sample. Experimental realizations of Dirac physics in graphene nanoelectronics will thus depends on a smooth edge confinement. Lunch Club Overview |
| Date: | Tue, 20.10.2009 |
| Time: | 12:30 |
| Duration: | 60 min |
| Location: | TU Vienna, Inst. f. Theoretical Physics, Freihaus, Wiedner Hauptstr. 8-10, 10. OG, SEM136 |
| Contact: | Max Attems, David Burke, Marcus Huber |
| Das klassische Klein-Gordon Feld auf gekrümmten Raumzeiten |
| Speaker: | Jakob Yngvason (Univ. Wien) (Fakultät für Physik) |
| Abstract: | im Rahmen des Seminars für Mathematische Physik |
| Date: | Tue, 20.10.2009 |
| Time: | 14:30 |
| Duration: | 60 min |
| Location: | Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | J. Yngvason |
| Holomorphic properties of form factors |
| Speaker: | Jürg Gasser (Univ. Bern) (Fakultät für Physik) |
| Abstract: | 2. Vorlesung im Rahmen der Schrödinger-Gastprofessur 2009 |
| Date: | Tue, 20.10.2009 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Erwin Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock, 1090 Wien |
| Contact: | H. Neufeld |
| Plasma oscillations and the generation and detection of THz radiation |
| Speaker: | Prof. Dr. Hartmut Roskos, Johann Wolfgang Goethe-Universität Frankfurt (ADLIS Seminar) |
| Date: | Fri, 23.10.2009 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Seminarraum CBEG02, Institut f. Photonik, Gußhausstr. 27 |
| Contact: | Heike Höller, SFB ADLIS Sekretariat, Tel: 58801 13625 |
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