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Regensburg 1998 – scientific programme

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O: Oberflächenphysik

O 34: Poster (II)

O 34.18: Poster

Thursday, March 26, 1998, 20:00–22:30, Bereich C

Valence band structure of α-MoTe2 determined by ARPES in the CFS mode — •Th. B"oker, A. M"uller, J. Augustin, C. Ribbat, C. Janowitz, and R. Manzke — Institut f"ur Physik, Humboldt-Universit"at zu Berlin, Invalidenstraße 110, D-10115 Berlin

MoTe2 belongs to the large family of layered transition metal dichalcogenides (LTMD) whose crystal structure results from the stacking of sheets of hexagonally packed atoms in the sequence Te-Mo-Te, Te-Mo-Te. The band-structure of α-MoTe2 has been determined using angle-resolved photoelectron spectroscopy (ARPES) in the constant final state (CFS) mode. The angular and energy resolution is better than in previous measurements [1] and therefore a more detailed study of the complex valence band structure became possible. Additionally the occurence of a rather dispersionless peak like in other LMTD about 1eV below the VBM is observed which can not be explained within the one particle-band structure. A discussion of possible explanations about the origin of this state will be given in addition to reference [2].
This work has been suported by the BMBF under project number 05 622 KHA.

[1] I.T. McGovern, R.H. Williams, J. Phys. C 12, 2689 (1979)

[2] R. Coehoorn, C. Haas, Phys. Rev. B 35(12), 6195 (1987)

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