Predicion of charge separation in GaAs/AlAs cylindrical Russian Doll nanostructures

Details Predicion of charge separation in GaAs/AlAs cylindrical Russian Doll nanostructures Predicion of charge separation in GaAs/AlAs cylindrical Russian Doll nanostructures

1997-04-22

arxiv.org/abs/cond-mat/9704190v2

Physics

Condensed Matter

Materials Science

latex, 8 pages

Scientific paper

10.1103/PhysRevB.56.R15541

We have contrasted the quantum confinement of (i) multiple quantum wells of flat GaAs and AlAs layers, i.e. $(\GaAs)_{m}/(\AlAs)_n/(\GaAs)_p/(\AlAs)_q$, with (ii) ``cylindrical Russian Dolls'' -- an equivalent sequence of wells and barriers arranged as concentric wires. Using a pseudopotential plane-wave calculation, we identified theoretically a set of numbers ($m,n,p$ and $q$) such that charge separation can exist in ``cylindrical Russian Dolls'': the CBM is localized in the inner GaAs layer, while the VBM is localized in the outer GaAs layer.

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