Hall effect in hopping conduction in an ensemble of quantum dots

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

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The Hall effect in heterostructures with a two-dimensional array of tunneling-coupled Ge quantum dots grown by molecular-beam epitaxy on Si is investigated. The conductivity of these structures in zero magnetic field at 4.2 K varies in the range of 10−12−10−4 Ω−1, which includes both the diffusive transport under weak localization conditions and hopping conduction. It is shown that the Hall effect can be discerned against the magnetoresistance-related background in both high- and low-conductivity structures. The Hall coefficient in the hopping regime exhibits a nonmonotonic dependence on the occupancy of quantum dots by holes. This behavior correlates with that of the localization length of the hole wavefunctions.

Язык оригиналаанглийский
Страницы (с-по)308-312
Число страниц5
ЖурналJETP Letters
Номер выпуска5
СостояниеОпубликовано - 1 сент. 2017


Подробные сведения о темах исследования «Hall effect in hopping conduction in an ensemble of quantum dots». Вместе они формируют уникальный семантический отпечаток (fingerprint).