GaMnAs: layers, wires and dots

Details GaMnAs: layers, wires and dots GaMnAs: layers, wires and dots

2008-08-21

arxiv.org/abs/0808.2887v1

Physics

Condensed Matter

Materials Science

15 pages, 14 figures. To be published in Proc. XXXVII International School on the Physics of Semiconducting Compounds "Jaszowi

Scientific paper

Thin layers of GaMnAs ferromagnetic semiconductor grown by molecular beam epitaxy on GaAs(001) substrates were studied. To improve their magnetic properties the post-growth annealing procedures were applied, using the surface passivation layers of amorphous arsenic. This post growth treatment effectively increases the ferromagnetic-to-paramagnetic phase transition temperature in GaMnAs, and provides surface-rich MnAs layer which can be used for formation of low dimensional structures such as superlattices. If the surface rich MnAs layer consists of MnAs dots, then it is possible to grow Mn-doped GaAs nanowires

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