Resonant photoemission and absorption spectroscopy of the [Cu.sub.x]Ti[Se.sub.2] compound

Single crystals of the [Cu.sub.x]Ti[Se.sub.2] compound with x = 0.05, 0.09, and 0.33 have been grown. Resonance photoelectron Cu 3p-3d and 2d-3d spectra of the valence bands, the spectra of the core levels, and the L absorption spectra for titanium and copper have been obtained. It is shown that the...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2012-02, Vol.114 (2), p.324
Main Authors: Shkvarin, A.S, Yarmoshenko, Yu. M, Skorikov, N.A, Titov, A.A, Titov, A.N
Format: Article
Language:English
Subjects:
Titanium
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Summary:Single crystals of the [Cu.sub.x]Ti[Se.sub.2] compound with x = 0.05, 0.09, and 0.33 have been grown. Resonance photoelectron Cu 3p-3d and 2d-3d spectra of the valence bands, the spectra of the core levels, and the L absorption spectra for titanium and copper have been obtained. It is shown that the degree of oxidation of titanium atoms is +4 and the state of copper atoms is close to the state of free copper ions. It is found that the spectra of the valence bands obtained under the Cu 3p and 2p resonance conditions radically differ. For the spectra in the Cu 2p excitation regime, several bands corresponding to different decay channels of the excited state are observed. According to calculations of the density of states, the 3d states of copper are filled incompletely; the occupancy of the 3d band of copper is 9.5 electrons per atom.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776112020112