Doped carbon nanotubes as a model system of biased graphene
- Author(s)
- Péter Szirmai, Bence G. Markus, B. Dora, Gabor Fabian, János Koltai, V. Zolyomi, J. Kurti, B. Nafradi, László Forro, T. Pichler, F. Simon
- Abstract
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(s)
- Electronic Properties of Materials
- External organisation(s)
- Budapest University of Technology and Economics, Eötvös Loránd University Budapest, University of Manchester, École polytechnique fédérale de Lausanne
- Journal
- Physical Review B
- Volume
- 96
- No. of pages
- 7
- ISSN
- 2469-9950
- DOI
- https://doi.org/10.1103/PhysRevB.96.075133
- Publication date
- 08-2017
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103020 Surface physics, 103018 Materials physics, 103009 Solid state physics
- Keywords
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Condensed Matter Physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/doped-carbon-nanotubes-as-a-model-system-of-biased-graphene(fdcf28a6-445f-44ad-99cf-0ec80f2a1973).html