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