Premium
A photoemission study of the metallic ground state of potassium‐doped C 60 peapods
Author(s) -
Rauf H.,
Shiozawa H.,
Pichler T.,
Knupfer M.,
Büchner B.,
Kataura H.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200669198
Subject(s) - doping , condensed matter physics , materials science , fermi level , photoemission spectroscopy , angle resolved photoemission spectroscopy , density of states , electronic structure , carbon nanotube , valence (chemistry) , ground state , inverse photoemission spectroscopy , metal , nanotechnology , chemistry , x ray photoelectron spectroscopy , atomic physics , physics , electron , nuclear magnetic resonance , organic chemistry , quantum mechanics , metallurgy
We report on the doping dependence of the electronic structure of the valence band of mats of C 60 ‐filled single wall carbon nanotubes (C 60 peapods) studied by high resolution photoemission spectroscopy. In the pristine state, the bundles consist of approximately one third metallic tubes which are Tomonaga–Luttinger liquids (TLL) and thus show a power law scaling of the density of states near the Fermi level. The power law scaling factor of the pristine peapods is hardly increased compared to that of single‐walled carbon nanotubes (SWCNT). Upon doping we find a complex doping behavior and charge distribution between the electronic states of the SWCNT and the encaged C 60 chains. Close to the Fermi level this has consequences on the doping induced crossover from a TLL to a conventional Fermi liquid which is found at a higher charge transfer as compared to intercalated SWCNT bundles. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)