Low Temperature Physics: 41, 390 (2015); https://doi.org/10.1063/1.4919376
Физика Низких Температур: Том 41, Выпуск 5 (Май 2015), c. 501-507    ( к оглавлению , назад )

Electronic spectrum of atomic chain with Fano-Anderson impurities

Yuriy V. Skrypnyk

G.V. Kurdyumov Institute for Metal Physics, National Academy of Sciences of Ukraine Academician Vernadsky Blvd. 36, UA-03680 Kyiv-142, Ukraine
E-mail: yuriy.v.skrypnyk@gmail.com

Received February 4, 2015


Electronic spectrum of one-dimensional system with a low concentration of weakly bound Fano-Anderson impurities is considered. It is assumed that the energy of the impurity resonance is located in a vicinity of the band center of the host system. It is demonstrated that with increasing the impurity concentration the dispersion of states with the low damping undergoes a transformation. This transformation passes in a threshold manner and results in the reproduction of some characteristic features inherent in the cross-type spectrum rearrangement. At that, the density of states at the energy of the impurity resonance manifests a steady growth.

PACS: 73.22.–f Electronic structure of nanoscale materials and related systems;
PACS: 71.23.–k Electronic structure of disordered solids;
PACS: 71.55.–i Impurity and defect levels.

Key words: disordered system, low-dimensional system, impurity, spectrum rearrangement, electronic spectrum.

Published online: March 23, 2015