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Il Nuovo Cimento D - The localization dynamics of excitons within growth islands of GaAs/Al x Ga1−x As single quantum wells (SQW) have been investigated by time-resolved photoluminescence... 相似文献
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S Klann 《OR manager》1986,2(10):1, 4-1, 5
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Yaohui Zhang Robert Klann Holger T. Grahn Klaus H. Ploog 《Superlattices and Microstructures》1997,21(4):565-568
The transition between chaotic and periodic regimes in spontaneous current oscillations of weakly coupled, doped GaAs/AlAs superlattices has been observed by varying the external d.c. bias. The chaotic current oscillations are observed for voltage ranges, which exhibit a large negative differential conductance in the time-averaged I–V characteristic. Since this system can be described by a spatially distributed, non-linear system with many degrees of freedom, the coupling between the degrees of freedom in the chaotic windows is repulsive, while in the periodic windows it is attractive. 相似文献
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