Atomic clusters

Manifestation of auger processes in C1$s$-satellite spectra of single-walled carbon nanotubes

M. M. Brzhezinskaya^a, L. A. Pesin^b, V. M. Morilova^b, E. M. Baitinger<sup>c

a</sup> Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany
^b Chelyabinsk State Pedagogical University
^c Bundesanstalt für Materialforschung und Prüfung, Berlin, Germany

Abstract: Using the equipment of the Russian-German beamline of the synchrotron radiation at the BESSY II electron storage ring, satellite spectra accompanying the C1$s$ core lines in the cases of single-walled carbon nanotubes and highly ordered pyrolytic graphite have been measured with a high energy resolution. The Auger spectra corresponding to shaking of the valence system of carbon by the core vacancy have been found and investigated. The Auger spectra of the studied single-walled carbon nanotubes and highly ordered pyrolytic graphite are caused by annihilation of the excited $\pi^*$ electron with a hole in the $\pi$ subband. It has been established that the electron states in the conduction band have 3$\pi^*(gT, K, M)$ symmetry; i.e., they correspond to flat 3$\pi^*$ subband, which is localized by 12–13 eV above the Fermi level. It has been revealed that the general regularities of the distribution of electron states in the valence system insignificantly change during its shake-up by the excited core.

Received: 10.02.2012

 English version: Physics of the Solid State, 2012, 54:9, 1930–1934

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