Angle-Resolved Photoelectron Spectroscopy on CdTe(100) c(2×2)

• Authors: K. Gawlik , J. Brügmann , S. Harm , R. Manzke , M. Skibowski , B. Kowalski , B. Orłowski
• Languages of publication: EN

Abstracts

EN

The CdTe(100) c(2×2) surface prepared by ion bombardment and annealing was investigated by angle-resolved photoemission spectroscopy using synchrotron radiation with photon energies between 8.5 eV and 32 eV. The bulk band structure was determined along the ΓΔX-direction normal to the surface measuring energy-distribution curves. The results are compared with a theoretical valence band structure assuming free-electron-like final states in connection with k-conservation. For further comparison we calculated the final states by the pseudopotential method and analyzed the results in form of structure plots. In this way, most of the dispersing maxima in the normal emission spectra can be explained. For this mode of photoelectron spectroscopy the resulting dispersion must be due to the component of the Bloch wave vector normal to the surface, k_{⊥}, keeping surface related structures at a fixed binding energy position E_{b}. The lack of dispersion for five structures along ΓΔX gives experimental evidence for their surface origin.

Keywords

EN

73.20.At; 79.60.Bm

Discipline

• 73.20.At: Surface states, band structure, electron density of states
• 79.60.Bm: Clean metal, semiconductor, and insulator surfaces

• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 84
• Issue: 6
• Pages: 1093-1099

Dates

published

1993-12

received

1993-06-01

Contributors

author

K. Gawlik

• Institut für Experimental Physik, Universität Kiel, Olshausenstr. 40-60, 24098 Kiel, Germany

author

J. Brügmann

• Institut für Experimental Physik, Universität Kiel, Olshausenstr. 40-60, 24098 Kiel, Germany

author

S. Harm

• Institut für Experimental Physik, Universität Kiel, Olshausenstr. 40-60, 24098 Kiel, Germany

author

R. Manzke

• Institut für Experimental Physik, Universität Kiel, Olshausenstr. 40-60, 24098 Kiel, Germany

author

M. Skibowski

• Institut für Experimental Physik, Universität Kiel, Olshausenstr. 40-60, 24098 Kiel, Germany

author

B. Kowalski

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

author

B. Orłowski

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

Identifiers

DOI

10.12693/APhysPolA.84.1093