On the Temperature-Dependent Surface Structure of Metals

• Authors: H. Bonzel , U. Breuer
• Languages of publication: EN

Abstracts

EN

Recent experimental results based on X-ray photoelectron diffraction from a Pb(110) crystal are discussed in terms of surface roughening and surface melting. In comparison to other reports on Pb(110) surface roughening it is recognized that the correct determination of the roughening transition on (110) surfaces of fcc metals may be intrinsically difficult because of anisotropy. A novel technique for investigating the temperature-dependent surface free energy is described. The method involves the quasi-steady-state shape of periodic surface profiles on Au(111) and Au(100) single crystals. First results are reported for two crystallographic zones (111)⟨112⟩ and (100)⟨110⟩ of Au. These results illustrate the strong anisotropy of Δγ/γ of ~23% and ~ 4% at T = 0 K for the (111)⟨112⟩ and (100)⟨110⟩ zones, respectively. The data suggest that the low-index surfaces of Au(111) and (100) are not likely to roughen at T ≤ T_{M}.

Keywords

EN

68.35.Rh; 68.35.Md; 79.60.Cn; 82.65.Dp

Discipline

• 68.35.Md: Surface thermodynamics, surface energies(see also 05.70.Np Interface and surface thermodynamics in statistical physics, thermodynamics and nonlinear dynamical systems; 65.40.gp Surface energy in thermal properties of condensed matter)
• 79.60.Cn: Liquids and liquid surfaces
• 68.35.Rh: Phase transitions and critical phenomena

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1992
• Volume: 81
• Issue: 2
• Pages: 265-272

Dates

published

1992-02

received

1991-07-01

(unknown)

1991-08-27

Contributors

author

H. Bonzel

• Institut für Grenzflächenforschung und Vakuumphysik Forschungszentrum Jülich, Postfach 1913, W-5170 Jülich, Germany

author

U. Breuer

• Institut für Grenzflächenforschung und Vakuumphysik Forschungszentrum Jülich, Postfach 1913, W-5170 Jülich, Germany

Identifiers

DOI

10.12693/APhysPolA.81.265