Doped carbon nanotubes as a model system of biased graphene
| Autor: | Thomas Pichler, János Koltai, Bálint Náfrádi, L. Forró, Viktor Zólyomi, Balázs Dóra, Bence G. Márkus, Gábor Fábián, Jenő Kürti, Péter Szirmai, Ferenc Simon |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Nanotube
Materials science Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Mesoscale and Nanoscale Physics Graphene Magnetism FOS: Physical sciences 02 engineering and technology Electron Carbon nanotube 021001 nanoscience & nanotechnology 01 natural sciences law.invention Brillouin zone Condensed Matter::Materials Science Condensed Matter - Strongly Correlated Electrons law 0103 physical sciences Thermoelectric effect Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Density of states 010306 general physics 0210 nano-technology |
| Popis: | 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 (SWCNT) and show using electron spin resonance spectroscopy that a sizeable 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|