The minority spin surface bands of CoS₂(001)

Authors

Ning Wu, University of Nebraska-Lincoln
Renat F. Sabirianov, University of Nebraska at OmahaFollow
Wai-Ning Mei, University of Nebraska at OmahaFollow
Yaroslav B. Losovyj, Louisiana State University at Baton RougeFollow
N. Lozova, Louisiana State University
M. Manno, University of Minnesota
C. Leighton, University of Minnesota
Peter A. Dowben, University of Nebraska-LincolnFollow

Date of this Version

2009

Comments

Published in J. Phys.: Condens. Matter 21 (2009) 295501 (6pp)

Abstract

Angle-resolved photoemission was used to study the surface electronic band structure of high quality single crystals of ferromagnetic CoS₂ (below 120 K). Strongly dispersing Co t_2g bands are identified along the (100) k _ǁ direction, the Γ-X line of the surface Brillouin zone, in agreement with model calculations. The calculated surface band structure includes corrections for the previously determined surface structure of CoS₂(001) and is in general agreement with the experimental photoemission spectra in the region of the Fermi level. There is evidence of the existence of several minority spin surface states, falling into a gap of the projected minority spin bulk CoS₂(001) band structure.