https://doi.org/10.1140/epjb/e2004-00106-1
√3 linear structures in the Te/Ni(111) system
Advanced Materials Laboratory, National Institute
for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
Corresponding author: a suehara.shigeru@nims.go.jp
Received:
14
April
2003
Revised:
1
December
2003
Published online:
20
April
2004
Surface structures in the Te/Ni(111) system are revealed
by using reflection high-energy electron diffraction combined with
X-ray and ultraviolet photoelectron spectroscopies.
At a 0.33 mono-layer (ML)-Te/Ni(111) surface, a reversible
structural phase transition is observed with a
transition temperature Tc of 380 
C.
The diffraction pattern from the low temperature phase is
accompanied by streaks. The high and low temperature phases
are characterized by 
and 
rectangle, respectively.
The mechanism of the phase transition is explained by the order-disorder
transition with a rumpled chain model.
Both 0.51 ML- and 0.44 ML-Te/Ni(111) surfaces exhibit the complex
diffraction patterns accompanied by diffuse streaks.
These surface structures are characterized by the 
rectangle and 
, respectively.
All diffuse streaks obtained at the above surfaces are consistently
interpreted in the view of the ill-ordered arrangements of the
well-ordered 
linear chains.
It is shown that the “ linear structure” is the key
in the Te/Ni(111) system.
PACS: 61.14.Hg – Low-energy electron diffraction (LEED) and reflection high-energy electron diffraction (RHEED) / 68.65.-k – Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties / 64.60.Cn – Order-disorder transformations; statistical mechanics of model systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
