Order-disorder transition in the surface charge-density-wave phase of Cu(001)-c(4x4)-In
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502 (Japan)
We have investigated the x-ray critical scattering from In/Cu(001) near the charge-density-wave phase transition. The critical exponents of the temperature dependence of the order parameter, the susceptibility, and the correlation length of the order parameter fluctuations are in agreement with those expected for a two-dimensional Ising-type phase transition. The lattice transition temperature, T{sub cl}=345 K, is 60 K lower than that for the electronic transition reported recently. The surface phase transition in this system is not well described by conventional weak- or strong-coupling theories, which assume a single characteristic energy gap. It is suggested that the electronic and lattice degrees of freedom on the surface are governed separately by two different energy gaps.
- OSTI ID:
- 20719349
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 8 Vol. 72; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
Similar Records
Displacive phase transition at the 5/3 monolayer of Pb on Ge(001)
Multilayer reconstruction and order-disorder structural phase transition of the clean W(001) surface
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE DENSITY
COPPER
CORRELATIONS
DEGREES OF FREEDOM
ENERGY GAP
FLUCTUATIONS
INDIUM
ISING MODEL
ORDER PARAMETERS
ORDER-DISORDER TRANSFORMATIONS
SURFACES
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS
X RADIATION
X-RAY DIFFRACTION