Magneto-transporte em sistemas semicondutores com gas de eletrons bidimensional
AUTOR(ES)
Alvaro Guedes Soares
DATA DE PUBLICAÇÃO
1995
RESUMO
The basic purpose of this work has been the implementation of magnetic-transport technics on semiconductor heterostructures that present two-dimensional electron gas (2-DEG), particularly, the Effect Shubnikov-de Haas (SdH) and the Quantum Hall Effect (QHE). This purpose, was accomplished through the recuperation of a superconductor magnetic coil (cryostat and control system) that makes it possible to measure with magnetic fields until 14 Tesla. Shubnikov-de Haas and Quantum Hall Effect measurements has been made in heterojunction samples of GaAs/AlxGa1-xAs and in a GaAs/AlxGa1-xAs/InyGa1-yAs heterostruture. The results are in good agreement with theoretical models. They are evidence of the two-dimensional character of the electron gas, and from them we could obtain its electronic density
ASSUNTO(S)
descargas eletricas atraves de gases semicondutores eletrons - emissão
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=vtls000086372Documentos Relacionados
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