Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-08-04
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
3 figures, 1 table
Scientific paper
The approximate location in the Zaanen-Sawatzky-Allen diagram of the phase-separated (Ga,Mn)As material, consisting of MnAs nanoclusters embedded in GaAs, is determined on the basis of configuration-interaction (CI) cluster-model analysis of their Mn 2p core-level photoemission. The composite material is found to belong to the special class of materials with negative charge-transfer energy (delta). As such, its metallic or insulating/semiconducting behavior depends on the strength of the p-d hybridization (affected by strain) relative to the (size-dependent) p-bandwidth. Whereas internal strain in the embedded clusters counteracts gap opening, a metal-to-semiconductor transition is expected to occur for decreasing cluster size, associated to the opening of a small gap of p-p type (covalent gap). The electronic properties of homogeneous and phase-separated (Ga,Mn)As materials are analyzed, with emphasis on the nature of their metal-insulator transitions.
Moreno Manuel
Ploog Klaus H.
No associations
LandOfFree
Phase-separated high-temperature-annealed (Ga,Mn)As: A negative charge-transfer-energy material does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Phase-separated high-temperature-annealed (Ga,Mn)As: A negative charge-transfer-energy material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase-separated high-temperature-annealed (Ga,Mn)As: A negative charge-transfer-energy material will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-15066