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Accession Number:
ADP007926
Title:
Rotationally Anisotropic Second-Harmonic Generation Studies of the Structure and Thermal Stability of Cu(110),
Corporate Author:
LOS ALAMOS NATIONAL LAB NM
Report Date:
1992-05-22
Abstract:
The microscopic structure and thermal stability of interfaces are of fundamental importance in determining a variety of materials properties. Order-disorder transitions on surfaces have recently received considerable attention in the scientific literature since the dynamics of such processes can impose fundamental limits on material performance at elevated temperatures. Many high-index 11 n faces where n2 of single-crystal metal surfaces are known to undergo this type of phase-transition. By definition, roughening of an atomically clean surface consists of the proliferation of atomic steps by thermal means at a roughening temperature, TR, where the surface free energy for creation of a step becomes zero. An unresolved question of fundamental importance is whether the roughening temperature of a low-index 110 surface can be lower than the bulk crystal melting temperature. For high index faces, a less stringent definition of roughening involving the proliferation of kinks on the already present step rows that can meander randomly has been suggested.
Supplementary Note:
This article is from 'Organization of the Optical Society of America Photonic Science Topical Meeting Series. Volume 3. The Microphysics of Surfaces: Beam-Induced Processes. Held in Santa Fe, New Mexico on 11-13 Feb 1991.' AD-A254 135,p114-117.
Pages:
0004
File Size:
0.00MB
