Details
| Original language | English |
|---|---|
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 67 |
| Issue number | 12 |
| Publication status | Published - 31 Mar 2003 |
Abstract
The low coverage phase transitions of the (formula presented) and the (formula presented) chain structures of the Sr/Mo(112) system have been investigated with low-energy electron diffraction (LEED) at constant coverages. It turns out that both structures show similar physics. They first undergo depinning phase transitions at temperatures just below 100 K into striped domain wall structures. The domain wall lattice shows continuous melting at temperatures between 197 and 218 K. Coupling between the adsorbate chains can be described by the potential created by adsorbate-induced charge density waves involving surface states. Within this model domain wall formation appears as thermal excitation of stacking faults on a discrete lattice. For the (formula presented) structure, domain wall formation energies of approximately 65 and 38 meV have been derived for heavy and light walls, respectively, from a fit to the experimental data of depinning.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B - Condensed Matter and Materials Physics, Vol. 67, No. 12, 31.03.2003.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Depinning transitions between adsorbate chains coupled by Friedel oscillations
AU - Godzik, G.
AU - Block, Thomas
AU - Pfnür, Herbert
PY - 2003/3/31
Y1 - 2003/3/31
N2 - The low coverage phase transitions of the (formula presented) and the (formula presented) chain structures of the Sr/Mo(112) system have been investigated with low-energy electron diffraction (LEED) at constant coverages. It turns out that both structures show similar physics. They first undergo depinning phase transitions at temperatures just below 100 K into striped domain wall structures. The domain wall lattice shows continuous melting at temperatures between 197 and 218 K. Coupling between the adsorbate chains can be described by the potential created by adsorbate-induced charge density waves involving surface states. Within this model domain wall formation appears as thermal excitation of stacking faults on a discrete lattice. For the (formula presented) structure, domain wall formation energies of approximately 65 and 38 meV have been derived for heavy and light walls, respectively, from a fit to the experimental data of depinning.
AB - The low coverage phase transitions of the (formula presented) and the (formula presented) chain structures of the Sr/Mo(112) system have been investigated with low-energy electron diffraction (LEED) at constant coverages. It turns out that both structures show similar physics. They first undergo depinning phase transitions at temperatures just below 100 K into striped domain wall structures. The domain wall lattice shows continuous melting at temperatures between 197 and 218 K. Coupling between the adsorbate chains can be described by the potential created by adsorbate-induced charge density waves involving surface states. Within this model domain wall formation appears as thermal excitation of stacking faults on a discrete lattice. For the (formula presented) structure, domain wall formation energies of approximately 65 and 38 meV have been derived for heavy and light walls, respectively, from a fit to the experimental data of depinning.
UR - http://www.scopus.com/inward/record.url?scp=0038219543&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.67.125424
DO - 10.1103/PhysRevB.67.125424
M3 - Article
AN - SCOPUS:0038219543
VL - 67
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 12
ER -