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Electronic structure and magnetism of Mn dopants in GaN nanowires: Ensemble vs single nanowire measurements
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We studied the electronic structure and magnetization of Mn dopants in GaN nanowires at the ensemble and single nanowire levels by near edge x-ray absorption fine structure spectroscopies. The results of single nanowire measurements indicate that Mn adopts tetrahedral coordination in GaN nanowires and has mixed oxidation state (Mn2+/Mn3+), with Mn2+ being in relative majority. Ensemble nanowire spectra suggest co-deposition of Mn secondary phases alongside nanowires. Single nanowire x-ray magnetic circular dichroism indicates intrinsic magnetic ordering of Mn dopants at 300 K. In contrast, as-grown nanowire samples show only residual magnetization, due to nanowire orientation dependence of magnetization.
Title: Electronic structure and magnetism of Mn dopants in GaN nanowires: Ensemble vs single nanowire measurements
Description:
We studied the electronic structure and magnetization of Mn dopants in GaN nanowires at the ensemble and single nanowire levels by near edge x-ray absorption fine structure spectroscopies.
The results of single nanowire measurements indicate that Mn adopts tetrahedral coordination in GaN nanowires and has mixed oxidation state (Mn2+/Mn3+), with Mn2+ being in relative majority.
Ensemble nanowire spectra suggest co-deposition of Mn secondary phases alongside nanowires.
Single nanowire x-ray magnetic circular dichroism indicates intrinsic magnetic ordering of Mn dopants at 300 K.
In contrast, as-grown nanowire samples show only residual magnetization, due to nanowire orientation dependence of magnetization.
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