Heterojunctions
Mostrando 13-15 de 15 artigos, teses e dissertações.
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13. Caracterização de semicondutores III-V : descontinuidades de bandas e poços quanticos
In this work, we present a systematic study of two properties of III-V compounds heterostructures which are of great interest to Semiconductor and Device Physics: band offsets in isotype heterojunctions (HJs) grown by LPE and optical properties of MOVPE grown quantum wells. Using for the first time the technique of electrochemical C-V profiling, we measured
Publicado em: 1991
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14. Scattering assisted by phonons: some exactly solvable models. / Espalhamento assistido por fônons: alguns modelos exatamente solúveis.
In this work we consider the scattering of excitations in systems in which a local scatterer center is coupled to single vibrational mode. The effects of the coupling are studied in two particular systems, namely, the tunneling of electrons in heterojunctions and the scattering of excitations by impurities in solids. In both cases inelastic scattering is obs
Publicado em: 1990
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15. Polaronic effects in one and two dimensional semiconductor heterostructures. / Efeitos polarônicos em estruturas semicondutoras em uma e duas dimensões.
In this work we study the polaronic effects on the two dimensional electron gas present in semiconductor heteroestructures (GaAs-AlGaAs heterojunctions and quantum wells) when a uniform magnetic field is applied perpendicular to the interface, using second order perturbation theory. By taking into account the effect of nonparabolicity and screening of the el
Publicado em: 1988