Resonant photoemission and absorption spectroscopy of the Cu{sub x}TiSe{sub 2} compound

Journal Article · Wed Feb 15 00:00:00 EST 2012 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776112020112· OSTI ID:22027914

Yarmoshenko, Yu M; Skorikov, N A ^[1]; Titov, A A ^[2]; Titov, A N ^[1]

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1. Russian Academy of Sciences, Institute of Metal Physics, Ural Branch (Russian Federation)
2. Ural State University (Russian Federation)

Single crystals of the Cu{sub x}TiSe{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.

• OSTI ID: 22027914
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 114, Issue 2; Other Information: Copyright (c) 2012 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
ATOMS
CONCENTRATION RATIO
COPPER
COPPER IONS
ELECTRONIC STRUCTURE
ELECTRONS
ENERGY-LEVEL DENSITY
EXCITATION
EXCITED STATES
INTERMETALLIC COMPOUNDS
MONOCRYSTALS
OXIDATION
PHOTOEMISSION
RESONANCE
SELENIUM
TITANIUM
VALENCE