Electron spectroscopic studies of nanowires formed by (GaMn)As growth on GaAs(111)B

TL;DR

This study uses valence band photoemission to analyze how Mn atoms migrate from MnAs particles into GaMnAs nanowires grown on GaAs(111)B, revealing spectral changes related to nanowire development.

Contribution

It provides new insights into the electronic structure evolution during nanowire growth, highlighting Mn transfer dynamics using spectroscopic techniques.

Findings

Spectral changes indicate Mn dilution in nanowires.

Resonant photoemission dominates over Auger decay with increasing nanowire length.

Mn transfer from MnAs particles into nanowires observed.

Abstract

Valence band photoemission with photon energies around the Mn2p excitation threshold has been used to study the development of nanowires catalyzed by MnAs particles. A gradual change in the spectra with increasing nanowire length is observed, such that the resonant photoemission eventually dominates over the Auger decay channel. The change is ascribed to dilution of Mn, showing that Mn is transferred from the MnAs particles into the nanowires.