Thermal roughness of a close-packed metal surface: Pt(001)

Journal Article · Mon Aug 10 00:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.941· OSTI ID:7019426

Abernathy, D L; Mochrie, S G.J. ^[1]; Zehner, D M ^[2]; Gruebel, G; Gibbs, D ^[3]

---

1. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307 (United States)
2. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6057 (United States)
3. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)

An x-ray scattering study of the morphology of the Pt(001) surface reveals that below 1820 K it is atomically smooth on length scales exceeding 5000 A. However, above 1820 K the Pt(001) surface is rough. Specifically, the scattering near the specular condition is diffuse, and may be modeled using a height-height correlation function which diverges logarithmically at large distances. Our data suggest that the average separation between thermally generated steps is many lattice constants.

• DOE Contract Number: AC05-84OR21400; AC02-76CH00016
• OSTI ID: 7019426
• Journal Information: Physical Review Letters; (United States), Vol. 69:6; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PLATINUM
SURFACE PROPERTIES
CORRELATION FUNCTIONS
MICROSTRUCTURE
MORPHOLOGY
PHASE TRANSFORMATIONS
ROUGHNESS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 1000-4000 K
X-RAY DIFFRACTION
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
ELEMENTS
FUNCTIONS
METALS
PLATINUM METALS
SCATTERING
TEMPERATURE RANGE
TRANSITION ELEMENTS
360102* - Metals & Alloys- Structure & Phase Studies