STM light emission spectroscopy of individual quantum wells: measurement of transport parameters in real space
AUTOR(ES)
Ushioda, S., Tsuruoka, T., Ohizumi, Y., Hashimoto, H.
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2004-06
RESUMO
By spectroscopically analyzing the light emitted from the tip-sample gap of the scanning tunneling microscope (STM), we have investigated the carrier transport as well as the luminescence properties of AlGaAs/GaAs quantum wells (QW's). The emission intensity form a target well was measured as a function of the tip position on a cleaved (110) surface of the QW structures. The thermalization length and the diffusion length of the injected electrons were determined in real space.
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