Disentanglement of the unoccupied electronic structure in metallic and semiconducting C-60 peapods
- Author(s)
- Christian Kramberger, Paola Ayala, Hidetsugu Shiozawa, Ferenc Simon, Alexander Friedrich, Xianjie Liu, Mark Rümmeli, Yasumitsu Miyata, Hiromichi Kataura, Patrick Hoffmann, Thomas Pichler
- Abstract
We provide insight into the C1s x-ray absorption response of C-60 encaged in metallicity-sorted single-walled carbon nanotubes. The partial density of states observed for different constituent species unveils their distinct electronic properties. We identify the relative positions and filling of the one-dimensional van Hove singularities in the hosting nanotubes and the molecular orbitals of the encaged fullerenes. We directly address the possible charge transfer and especially the predicted existence of a shallow half-filled electronic t(1u) band in metallic peapods. In the experiment, we find the t(1u) of C-60 unoccupied in the semiconducting nanotubes. In metallic nanotubes, it is observed 100-200 meV above the Fermi level E-F.
- Organisation(s)
- Electronic Properties of Materials
- External organisation(s)
- Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, National Institute of Advanced Industrial Science and Technology (AIST), Helmholtz-Zentrum Berlin für Materialien und Energie, University of Surrey
- Journal
- Physical Review B
- Volume
- 83
- No. of pages
- 5
- ISSN
- 1098-0121
- DOI
- https://doi.org/10.1103/PhysRevB.83.195438
- Publication date
- 2011
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/6b8bdf10-f6ab-4178-8fd1-7fc79cd78325