Two-Site Correlations in a Surface Layer Adsorbed on the Crystal

• Authors: L. Wojtczak , I. Zasada , J. Le Bossé , J. Lopez , J. Rousseau
• Languages of publication: EN

Abstracts

EN

The incohorent scattering of electrons by layer adsorbed at a single crystal surface is determined by the Fourier transform of correlation functions of elements forming this layer. The model of the description of atoms or molecules adsorbed on the surface is formulated by the occupation operators which are represented by the pseudospin operators. The calculations of the correlation functions are performed by means of methods which consider a given pair of elements embedded in the effective field of remaining elements of the system while the interaction between the elements of the pair are taken in its exact form. Two approaches are presented here, i.e. the cumulant average and constant coupling approximations, and the case of binary chemisorption is considered in detail. The problem of the correlation symmetry is also discussed.

Keywords

EN

68.35.-p

Discipline

• 68.35.-p: Solid surfaces and solid-solid interfaces: structure and energetics

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1991
• Volume: 80
• Issue: 5
• Pages: 631-648

Dates

published

1991-11

received

1991-03-21

Contributors

author

L. Wojtczak

• Institute of Physics, Łódź University, 90-236 Łódź, Poland

author

I. Zasada

• Institute of Physics, Łódź University, 90-236 Łódź, Poland

author

J. Le Bossé

• Laboratoire de Physique des Interfaces, Bgt. 203, Université Claude Bernard, F-69622 Villeurbanne Cedex, France

author

J. Lopez

• Laboratoire de Physique des Interfaces, Bgt. 203, Université Claude Bernard, F-69622 Villeurbanne Cedex, France

author

J. Rousseau

• Laboratoire de Physique des Interfaces, Bgt. 203, Université Claude Bernard, F-69622 Villeurbanne Cedex, France

Identifiers

DOI

10.12693/APhysPolA.80.631