title: Spin splitting anisotropy in single diluted magnetic nanowire heterostructures.
abstract: We study the impact of the nanowire shape anisotropy on the spin splitting of excitonic photoluminescence. The experiments are performed on individual ZnMnTe/ZnMgTe core/shell nanowires as well as on ZnTe/ZnMgTe core/shell nanowires containing optically active magnetic CdMnTe insertions. When the magnetic field is oriented parallel to the nanowire axis, the spin splitting is several times larger than for the perpendicular field. We interpret this pronounced anisotropy as an effect of mixing of valence band states arising from the strain present in the core/shell geometry. This interpretation is further supported by theoretical calculations which allow to reproduce experimental results.
authors.affiliation: Institute of Physics, Polish Academy of Sciences , Al Lotników 32/46, PL-02-668 Warsaw, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Szymura
authors.forename: Piotr
authors.initials: P
authors.lastname: Wojnar
authors.forename: Łukasz
authors.initials: Ł
authors.lastname: Kłopotowski
authors.forename: Jan
authors.initials: J
authors.lastname: Suffczyński
authors.forename: Mateusz
authors.initials: M
authors.lastname: Goryca
authors.forename: Tomasz
authors.initials: T
authors.lastname: Smoleński
authors.forename: Piotr
authors.initials: P
authors.lastname: Kossacki
authors.forename: Wojciech
authors.initials: W
authors.lastname: Zaleszczyk
authors.forename: Tomasz
authors.initials: T
authors.lastname: Wojciechowski
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Karczewski
authors.forename: Tomasz
authors.initials: T
authors.lastname: Wojtowicz
authors.forename: Jacek
authors.initials: J
authors.lastname: Kossut
keywords: Nanowires; diluted magnetic semiconductors; magneto-optical anisotropy; spintronics