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Regensburg 1998 – scientific programme

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O: Oberflächenphysik

O 34: Poster (II)

O 34.14: Poster

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

Angle-resolved Photoemission study of the HgTe(110) surface — •N. Orlowski1, J. Augustin1, Z. Gołacki2, C. Janowitz1, A. M"uller1, and R. Manzke11Institut f"ur Physik, Humboldt-Universit"at Berlin, Invalidenstr. 110, D-10115 Berlin — 2Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46,02-668 Warsaw, Poland

We report on recent angle-resolved photoemission measurements at cleaved HgTe(110) using HeIα and synchrotron radiation.
In addition to our contribution in the last year we present here the valence band structure of the whole bulk Brillouin zone in ΓΣKX direction taken with photon energies between 20 and 120 eV. Several experimental geometries were utilized in order to detect polarization effects of the bands with respect to the incoming light.
Furthermore, we took spectra along the the high symmetry lines of the surface Brillouin zone. So we present the experimental surface band structure of HgTe(110) along the lines Γ X, Γ X and XMX
The results will be compared to theoretical predictions, particularly the zero gap behaviour of HgTe, as well as to experimental data of CdTe.
Supported by the BMBF (project 05 622 KHA)

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