Details
| Original language | English |
|---|---|
| Pages (from-to) | 978-985 |
| Number of pages | 8 |
| Journal | Surface Science |
| Volume | 601 |
| Issue number | 4 |
| Publication status | Published - 12 Dec 2006 |
Abstract
We performed scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED) experiments for Dy adsorbed on Mo(1 1 2) in the monolayer regime in order to clarify the concentration dependent reordering of the surface glass that exists for coverages above 0.58 of a monolayer (ML) after annealing to temperatures higher than 400 K. The partial reaction model developed earlier is corroborated. The Dy defect structure formed initially in Dy-Mo surface alloy acts as nucleation sites for Dy so that clusters with a wide distribution of lateral distances are formed, as found in particular at a coverage of 0.28 ML. The change in bonding character at coverages above 0.58 ML leads to reordering of the defects and the concentration dependent modulation of the adsorbed Dy layers. Examples at coverages of 0.7, 0.9 and 1.15 ML are shown and compared.
Keywords
- Dysprosium, LEED, Molybdenum, Structure, Tunneling microscopy, Two-dimensional glasses
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Surface Science, Vol. 601, No. 4, 12.12.2006, p. 978-985.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Two-dimensional glasses and their concentration dependent re-ordering
T2 - Dy on Mo(1 1 2)
AU - Tegenkamp, Christoph
AU - Pfnür, Herbert
AU - Fedorus, A.
AU - Naumovets, A.
N1 - Funding information: Financial support of this work by the Deutsche Forschungsgemeinschaft is greatfully acknowledged. This work was also supported by the National Academy of Sciences of Ukraine (Project VTs-92) and by the Basic Research Foundation of the Ministry of Ukraine for Education and Science (Project 02.07/00047).
PY - 2006/12/12
Y1 - 2006/12/12
N2 - We performed scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED) experiments for Dy adsorbed on Mo(1 1 2) in the monolayer regime in order to clarify the concentration dependent reordering of the surface glass that exists for coverages above 0.58 of a monolayer (ML) after annealing to temperatures higher than 400 K. The partial reaction model developed earlier is corroborated. The Dy defect structure formed initially in Dy-Mo surface alloy acts as nucleation sites for Dy so that clusters with a wide distribution of lateral distances are formed, as found in particular at a coverage of 0.28 ML. The change in bonding character at coverages above 0.58 ML leads to reordering of the defects and the concentration dependent modulation of the adsorbed Dy layers. Examples at coverages of 0.7, 0.9 and 1.15 ML are shown and compared.
AB - We performed scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED) experiments for Dy adsorbed on Mo(1 1 2) in the monolayer regime in order to clarify the concentration dependent reordering of the surface glass that exists for coverages above 0.58 of a monolayer (ML) after annealing to temperatures higher than 400 K. The partial reaction model developed earlier is corroborated. The Dy defect structure formed initially in Dy-Mo surface alloy acts as nucleation sites for Dy so that clusters with a wide distribution of lateral distances are formed, as found in particular at a coverage of 0.28 ML. The change in bonding character at coverages above 0.58 ML leads to reordering of the defects and the concentration dependent modulation of the adsorbed Dy layers. Examples at coverages of 0.7, 0.9 and 1.15 ML are shown and compared.
KW - Dysprosium
KW - LEED
KW - Molybdenum
KW - Structure
KW - Tunneling microscopy
KW - Two-dimensional glasses
UR - http://www.scopus.com/inward/record.url?scp=33846847999&partnerID=8YFLogxK
U2 - 10.1016/j.susc.2006.11.041
DO - 10.1016/j.susc.2006.11.041
M3 - Article
AN - SCOPUS:33846847999
VL - 601
SP - 978
EP - 985
JO - Surface Science
JF - Surface Science
SN - 0039-6028
IS - 4
ER -