Some aspects of diffracted waves formation at RHEED on a reconstructed crystal face

TL;DR

This paper analyzes how RHEED reflexes form during reconstructed surface transitions, emphasizing the influence of domain size and density, and offers a geometrical framework for interpreting RHEED data in surface reconstruction studies.

Contribution

It introduces a geometrical approach within the kinematic diffraction approximation to analyze RHEED reflex formation related to surface reconstruction parameters.

Findings

RHEED reflex intensity depends on domain size and density.

A transformation in the functional dependence relates surface coverage to RHEED signals.

The framework aids in interpreting reconstructed transition kinetics.

Abstract

The evolution of RHEED reflexes intensity during reconstructed transitions characterizes (often implicitly) reconstructed surface state peculiarities. The approaches of a correct RHEED data interpretation, aimed at obtaining information about reconstructed transitions kinetics, are considered in the present work. In particular, the nature of RHEED reflexes formation, depending on such parameters as the average size of reconstructed domains and number of such domains per area unit, is analyzed within the kinematic approximation of the diffraction theory. This geometrical description is a convenient and effective (productive) way of analyzing reconstructed transitions mechanisms and parameters. The transformation of the functional dependence between the measured values (RHEED reflexes intensity picture) and the degree of surface coverage by reconstruction domains, at a change of these domains average size and distribution density, is shown. This work provides the community with a useful framework for such type of theoretical studies.