Die u:cris Detailansicht:
Doped carbon nanotubes as a model system of biased graphene
- Autor(en)
- Péter Szirmai, Bence G. Markus, B. Dora, Gabor Fabian, János Koltai, V. Zolyomi, J. Kurti, B. Nafradi, László Forro, T. Pichler, F. Simon
- Abstrakt
Albeit difficult to access experimentally, the density of states (DOS) is a key parameter in solid-state systems, which governs several important phenomena including transport, magnetism, thermal, and thermoelectric properties. We study DOS in an ensemble of potassium intercalated single-wall carbon nanotubes and show, using electron spin resonance spectroscopy, that a sizable number of electron states are present, which gives rise to a Fermi-liquid behavior in this material. A comparison between theoretical and the experimental DOS indicates that it does not display significant correlation effects, even though the pristine nanotube material shows a Luttinger-liquid behavior. We argue that the carbon nanotube ensemble essentially maps out the whole Brillouin zone of graphene, thus it acts as a model system of biased graphene.
- Organisation(en)
- Elektronische Materialeigenschaften
- Externe Organisation(en)
- Budapest University of Technology and Economics, Eötvös Loránd University Budapest, University of Manchester, École polytechnique fédérale de Lausanne
- Journal
- Physical Review B
- Band
- 96
- Anzahl der Seiten
- 7
- ISSN
- 2469-9950
- DOI
- https://doi.org/10.1103/PhysRevB.96.075133
- Publikationsdatum
- 08-2017
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103020 Oberflächenphysik, 103018 Materialphysik, 103009 Festkörperphysik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Electronic, Optical and Magnetic Materials, Condensed Matter Physics
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/fdcf28a6-445f-44ad-99cf-0ec80f2a1973