The electronic band structure of CoS2

Angle-resolved and energy-dependent photoemission was used to study the band structure of paramagnetic CoS2 from high-quality single-crystal samples. A strongly dispersing hybridized Co-S band is identified along the Gamma-X line. Fermi level crossings are also analysed along this line, and the resu...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2007-04, Vol.19 (15), p.156224-156224 (10)
Main Authors: Wu, Ning, Losovyj, Ya B, Wisbey, David, Belashchenko, K, Manno, M, Wang, L, Leighton, C, Dowben, P A
Format: Article
Language:English
Subjects:
Clean metal, semiconductor, and insulator surfaces
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron and ion emission by liquids and solids
impact phenomena
Electron density of states and band structure of crystalline solids
Electron states
Exact sciences and technology
Other inorganic compounds
Photoemission and photoelectron spectra
Physics
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Summary:Angle-resolved and energy-dependent photoemission was used to study the band structure of paramagnetic CoS2 from high-quality single-crystal samples. A strongly dispersing hybridized Co-S band is identified along the Gamma-X line. Fermi level crossings are also analysed along this line, and the results are interpreted using band structure calculations. The Fermi level crossings are very sensitive to the separation in the S-S dimer, and it is suggested that the half-metallic gap in CoS2 may be controlled by the bonding-antibonding splitting in this dimer, rather than by exchange splitting on the Co atoms.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/19/15/156224