Ning Wu et al 2007 J. Phys.: Condens. Matter 19 156224 doi:10.1088/0953-8984/19/15/156224
Ning Wu1, Ya B Losovyj1,2, David Wisbey1, K Belashchenko1, M Manno3, L Wang3, C Leighton3 and P A Dowben1,4
Show affiliationsAngle-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 Γ–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.
71.20.-b Electron density of states and band structure of crystalline solids
79.60.-i Photoemission and photoelectron spectra
73.20.At Surface states, band structure, electron density of states
Issue 15 (16 April 2007)
Received 9 January 2007, in final form 24 February 2007
Published 26 March 2007
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