Magnetic field effect on the slow relaxation of photoconductance in tunnel coupled quantum dot arrays

N. P. Stepina, A. V. Shumilin, A. F. Zinovieva, A. V. Nenashev, A. Yu Gornov, A. V. Dvurechenskii

Результат исследования: Научные публикации в периодических изданияхстатья

Аннотация

The effect of magnetic field on the long-term photoconductance relaxation in two-dimensional arrays of Ge tunnel-coupled quantum dots grown on Si by molecular-beam epitaxy is studied. It was shown that the relaxation process can be slowed down as well as accelerated by magnetic field. The sign of changing the relaxation rate depends on the localization radius and the quantum dot occupancy. To explain an unusual acceleration effect we proposed a model based on the difference in probabilities of carrier transitions to single- or double-occupied quantum dots due to Zeeman effect.

Язык оригиналаанглийский
Номер статьи114126
Число страниц5
ЖурналPhysica E: Low-Dimensional Systems and Nanostructures
Том121
DOI
СостояниеОпубликовано - июл 2020

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