Quantum confinement effects in Si-Ge heterostructures with spatially ordered arrays of self-assembled quantum dots - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Quantum confinement effects in Si-Ge heterostructures with spatially ordered arrays of self-assembled quantum dots - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: Magnetotunneling spectroscopy was employed to probe the confinement invertical Si-Ge double-barrier resonant tunneling diodes with regularlydistributed Ge quantum dots. Their current-voltage characteristics reveal astep-like behavior in the vicinity of zero bias, indicating resonant tunnelingof heavy-holes via three-dimensionally confined unoccupied hole states in Gequantum dots. Assuming parabolic confinement we extract the strength of theconfinement potential of quantum dots.



Author: Oleksiy B. Agafonov, Christian Dais, Detlev Gr├╝tzmacher, Rolf J. Haug

Source: https://arxiv.org/







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