2Ural Federal University, Mira, 19, Ekaterinburg 620002, Russia
3НИФТИ федерального государственного автономного образовательного учреждения высшего образования «Нижегородский государственный университет им. Н.И. Лобачевского», пр. Гагарина, 23, корп. 3, г. Нижний Новгород, 603950, Россия pos Анотація:
Received December 6, 2016
Abstract
The longitudinal and Hall resistivities in the quantum Hall effect (QHE) regime for n-InGaAs/GaAs nanostructures with single and double quantum wells are investigated at B=(0–16) T and T=(0.05–4.2) K, before and after IR-illumination. The features of the critical behavior of the longitudinal and Hall conductance in the plateau-plateau regions are studied to identify the conditions of experimental observation of the scaling mode. Temperature dependences of QHE plateau-to-plateau transition width are analyzed on a base of two-parameter scaling theory.
PACS: 73.21.Fg Quantum wells; PACS: 73.40.–c Electronic transport in interface structures PACS: 73.43.–f Quantum Hall effects.
Key words: quantum Hall effect, scaling hypothesis, scale of impurity potential.