Abstract
Hexagonally ordered arrays of quantum wires of the diluted magnetic semiconductor Cd 1−x Mn x S (0<x<0.2) have been obtained by incorporating the semiconductor alloy into the ordered wire-like pores of mesoporous silica hosts (MCM-41). Electron paramagnetic resonance measurements indicate that the crystalline structure of the Cd 1− x Mn x S quantum wires changes from zincblende to wurtzite with increasing x. Photoluminescence and photoluminescence excitation spectroscopy have been performed at liquid helium temperatures in external magnetic fields up to 7.5 T . The photoluminescence studies of the transitions within the half-filled Mn 3d-shell reveal the existence of at least two kinds of Mn-centres with different crystal fields. A blue shift of more than 200 meV of the absorption edge of the Cd 1− x Mn x S wires compared to that of bulk material is found due to the lateral quantum confinement in the nanowires. In addition, the p–d exchange-induced bowing of the band gap with x is enhanced in the wire structures due to the confinement-induced shift of the lowest valence band state towards the Mn 3d-states.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physica E: Low-dimensional Systems and Nanostructures
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
