Giant spin splitting in optically active ZnMnTe/ZnMgTe core/shell nanowires.
An enhancement of the Zeeman splitting as a result of the incorporation of paramagnetic Mn ions in ZnMnTe/ZnMgTe core/shell nanowires is reported. The studied structures are grown by gold-catalyst assisted molecular beam epitaxy. The near band edge emission of these structures, conspicuously absent in the case of uncoated ZnMnTe nanowires, is activated by the presence of ZnMgTe coating. Giant Zeeman splitting of this emission is studied in ensembles of nanowires with various average Mn concentrations of the order of a few percent, as well as in individual nanowires. Thus, we show convincingly that a strong spin sp-d coupling is indeed present in these structures.
Institute of Physics, Polish Academy of Sciences, Al Lotników 32/46, 02-668 Warsaw, Poland. wojnar@ifpan.edu.pl
Piotr
P
Wojnar
Elżbieta
E
Janik
Lech T
LT
Baczewski
Sławomir
S
Kret
Elżbieta
E
Dynowska
Tomasz
T
Wojciechowski
Jan
J
Suffczyński
Joanna
J
Papierska
Piotr
P
Kossacki
Grzegorz
G
Karczewski
Jacek
J
Kossut
Tomasz
T
Wojtowicz