Kinetics of structural changes on GaSb(001) singular and vicinal surfaces during the UHV annealing

TL;DR

This study investigates the surface structural changes and desorption dynamics of GaSb(001) during UHV annealing, revealing the roles of terrace edges and surface miscut in phase transitions and activation energies.

Contribution

It provides detailed analysis of the kinetics of structural transitions and desorption processes on both singular and vicinal GaSb(001) surfaces, including activation energy measurements.

Findings

Structural transition (2x5) to (1x3) involves order-disorder transitions.

Surface miscut affects the transition dimensions.

Activation energies for various transitions were determined.

Abstract

The dynamics of processes of antimony desorption was investigated on the singular and vicinal GaSb(001) surface by RHEED method. The role of the terraces edges was determined during antimony evaporation in Langmuir desorption mode. It is shown that the structural transition (2x5) -> (1x3) is a complex of two transitions - order -> disorder and disorder -> order. The influence of the degree of surface miscut from the singular face on the dimension of the transition (2x5) -> DO was studied. The activation energies of structural transitions ex(2x5) -> (2x5), (2x5) -> DO and DO -> (1x3) on singular and vicinal faces GaSb(001) were determined.