We have identified a strongly dispersing band of CoS$_{2}$(100), with both sulfur and cobalt weight, along the $\Gamma $-X direction of the bulk Brillouin zone, from photon energy dependent angle resolved photoemission studies. From the critical points of the experimental band structure, the inner potential is estimated at about 4 to 5 eV, consistent with LEED I(V) analysis. The small inner potential indicates that CoS$_{2}$ has a narrow band width, consistent with the theoretical expectations. The clearly favored structural model from the LEED I(V) analysis is sulfur with cobalt terminated surface.
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Authors
Ning Wu
Dept. of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
Yaroslav Losovyj
Center for Advanced Microstructures and Devices, Louisiana State University
David Wisbey
Dept. of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
Kirill Belashchenko
Dept. of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
Wai-Ning Mei
Department of Physics, University of Nebraska-Omaha
Michael Manno
Department of Chemical Engineering and Materials Science, University of Minnosota
Lan Wang
Department of Chemical Engineering and Materials Science, University of Minnosota
Chris Leighton
Department of Chemical Engineering and Materials Science, University of Minnosota
Peter Dowben
Dept. of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
