Title: Low-temperature scanning tunneling microscopy and spectroscopy of spatial oscillations in the density of states near domain boundaries at the Ge(111)2X1 surface
Authors: Muzychenko, D. A ×
Savinov, S. V
Mantsevich, V. N
Maslova, N. S
Panov, V. I
Schouteden, Koen
Van Haesendonck, Christian #
Issue Date: Jan-2010
Publisher: Amer physical soc
Series Title: Physical review b vol:81 issue:3 pages:1-10
Article number: 035313
Abstract: By means of low-temperature scanning tunneling microscopy and scanning tunneling spectroscopy we demonstrate the existence of spatial oscillations in the local electron density of states of clean Ge(111)2X1 surfaces. The oscillations appear exclusively in the vicinity of boundaries between domains with different atomic arrangements and are present only within a limited range of tunneling voltages approximately between 0.2 and 0.8 V. From the spectroscopy measurements we are able to extract the energy versus wave-vector dispersion relation of the spatial oscillations in the local electron density of states. Relying on a tight-binding based model, we are able to link the observed phenomena to two-dimensional Tamm surface states that are formed within the semiconductor band gap and that are scattered at domain boundaries where translational symmetry is broken.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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