Low Temperature Physics: 33, 151 (2007); https://doi.org/10.1063/1.2409652 (5 pages)
Fizika Nizkikh Temperatur: Volume 33, Number 2-3 (February 2007), p. 211-216    ( to contents , go back )

Quantum magnetotransport in a n-InxGa1-xAs/GaAs double quantum well at tilted magnetic fields

M.V. Yakunin1, Yu.G. Arapov1, V.N. Neverov1, S.M. Podgornyh1, G.I. Harus1, N.G. Shelushinina1, B.N. Zvonkov2, and Е.А. Uskova2

1Institute of Metal Physics , S. Kovalevskoyi st. 18, Ekaterinburg 620219, Russia
E-mail: yakunin@imp.uran.ru

2Научно-исследовательский физико-технический институт при ННГУ г. Нижний Новгород, 603600, Россия
pos Анотація:

Received Jule 31, 2006

Abstract

Peculiarities due to a complicated double quantum well (DQW) energy spectrum are revealed from the precise scan of the (B^, B||) plane between the magnetic field components perpendicular and parallel to the layers of the n-InxGa1-xAs/GaAs (x ≈ 0.2) DQW while measuring its longitudinal magnetoresistivity. These peculiarities interfere with the structures connected with the magnetic breakdown. The experimental results are presented as gray-scale maps on the (B^, B||) plane, where the peculiarities form different trajectories, that can be described semi-quantitatively by using the quasi-classical calculations of the DQW energy spectrum quantization under a perpendicular field component. The peaks due to the magnetic breakdown are relatively enhanced with increasing the total field. These are spin—split at the highest parallel fields yielding the effective Lande g -factor value |g*| ≈ 3.

PACS: 73.50.Jt Galvanomagnetic and other magnetotransport effects;
PACS: 73.20.–r Electron states at surfaces and interfaces.

Key words: double quantum well, quantum Hall effect, tilted magnetic fields, g-factor.

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