Microsc. Microanal. Microstruct. 5, 277-282 (1994)
DOI: 10.1051/mmm:0199400504-6027700

Formation of an iodine zig-zag chain c(2 × 4) reconstruction on the Ge(111) surface

Mats Göthelid, Magnus Björkqvist, Ulf O. Karlsson et S. Anders Flodström

Dept. of Physics, Materials Physics, Royal Institute of Technology, S-10044 Stockholm, Sweden

Abstract
Room temperature adsorption of I2 on the Ge(111) surface is found to break the initial c(2 x 8) adatom reconstruction as iodine preferentially occupies the on top substrate site, breaks the backbonds between the adatom and the substrate and thus removes the Ge adatoms. As this process continues a c(2 x 4), and modifications thereof, reconstruction is formed consisting of chains of I2 molecules bound in almost T1 sites with a I-I bond length of 3.6 A.

PACS
6835 - Solid surfaces and solid-solid interfaces: Structure and energetics.
6843 - Chemisorption/physisorption: adsorbates on surfaces.

Key words
Experimental study -- Surface structure -- Adsorption structure -- Surface reconstruction -- Iodine -- Germanium -- Adsorption site -- STM -- Ultrahigh vacuum -- Surfaces -- Interfaces -- Condensed matter physics -- Materials science -- Physics -- Condensed state physics -- Nonmetals


© EDP Sciences 1994