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- Tyndall National InstituteIE88 papers
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5 papers · 2 filters
Tight-binding analysis of the electronic structure of dilute bismide alloys of GaP and GaAs
Muhammad Usman, Christopher A. Broderick, Andrew Lindsay +1
We develop an atomistic, nearest-neighbor sp3s* tight-binding Hamiltonian to investigate the electronic structure of dilute bismide alloys of GaP and GaAs. Using this model we calc…
Energy-band engineering for improved charge retention in fully self-aligned double floating-gate single-electron memories
Xiaohui Tang, Christophe Krzeminski, Aurélien Lecavelier des Etangs-Levallois +9
We present a new fully self-aligned single-electron memory with a single pair of nano floating gates, made of different materials (Si and Ge). The energy barrier that prevents stor…
Wettability and "petal effect" of GaAs native oxides
A. Gocalinska, K. Gradkowski, V. Dimastrodonato +4
We discuss unreported transitions of oxidized GaAs surfaces between (super)hydrophilic and hydrophobic states when stored in ambient conditions. Contact angles higher than 90deg an…
AlGaAs/GaAs/AlGaAs quantum wells as a sensitive tool for the MOVPE reactor environment
V. Dimastrodonato, L. O. Mereni, R. J. Young +1
We present in this work a simple Quantum Well (QW) structure consisting of GaAs wells with AlGaAs barriers as a probe for measuring the performance of arsine purifiers within a Met…
Relevance of the purity level in a MetalOrganic Vapour Phase Epitaxy reactor environment for the growth of high quality pyramidal sitecontrolled Quantum Dots
Valeria Dimastrodonato, Lorenzo O. Mereni, Robert J. Young +1
We report in this work on the spectral purity of pyramidal site-controlled InGaAs/AlGaAs Quantum Dots grown by metalorganic vapour phase epitaxy on(111)B oriented GaAs substrates.…