Wu Ning, Sabirianov R F, Mei W N, Losovyj Ya B, Lozova N, Manno M, Leighton C, Dowben P A
Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588-0111, USA.
J Phys Condens Matter. 2009 Jul 22;21(29):295501. doi: 10.1088/0953-8984/21/29/295501. Epub 2009 Jul 3.
Angle-resolved photoemission was used to study the surface electronic band structure of high quality single crystals of ferromagnetic CoS(2) (below 120 K). Strongly dispersing Co t(2g) bands are identified along the ⟨100⟩ [Formula: see text] direction, the [Formula: see text]-[Formula: see text] 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 CoS(2)(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 CoS(2)(001) band structure.
角分辨光电子能谱被用于研究高质量铁磁CoS₂单晶（低于120K）的表面电子能带结构。沿着表面布里渊区的⟨100⟩ [公式：见正文] 方向，即[公式：见正文]-[公式：见正文]线，识别出了强色散的Co t₂g能带，这与模型计算结果一致。计算得到的表面能带结构对先前确定的CoS₂(001)表面结构进行了修正，并且在费米能级区域与实验光电子能谱总体上一致。有证据表明存在几个少数自旋表面态，它们落入了投影的少数自旋体相CoS₂(001)能带结构的能隙中。
