Abstract
The Hall mobility of electrons is investigated as a function of the population of size-quantization subbands in the two-dimensional electron gas of a δ-doped layer in GaAs with constant total electron density N s =3.2×1012 cm−2 (three initially filled subbands) at T=4.2 K. The population of the subbands is varied by diamagnetic “ejection” of size-quantization levels (i.e., pushing them over the Fermi level) by a magnetic field oriented parallel to the plane of the δ-doped layer. The measurements are made in magnetic fields making small angles (5°) with the plane of the doping. The magnetic field component normal to the plane was used to measure the Hall mobility and density. It is found that the measured Hall mobility as a function of the ejecting magnetic field has a distinct maximum. This maximum is due to an increase in the electron mobility in the first subband (the ground subband is assigned the index 0) and electron redistribution between subbands with in increasing ejecting magnetic field parallel to the plane of the δ layer.
Similar content being viewed by others
References
K. Ploog, J. Cryst. Growth 81, 304 (1987).
E. F. Shubert, in Semiconductor and Semimetals “Epitaxial Microstructures”, edited by A. G. Gossard, Academic Press, New York, 1994, Vol. 40, p. 1.
Y. Fu and M. Willander, J. Appl. Phys. 78, 3504 (1995).
A. Zrenner, H. Reisinger, F. Koch et al., Phys. Rev. B 33, 5607 (1986).
D. C. Tsui, Phys. Rev. B, 4 4438 (1971).
F. Stern and W. E. Howard, Phys. Rev. 163, 816 (1967).
G. Q. Hai, N. Studart, and F. M. Peeters, Phys. Rev. B 52, 8363 (1995).
G. Q. Hai, and N. Studart, Phys. Rev. B 52, 2245 (1995).
A. B. Henriques, Phys. Rev. B 53, 16365 (1996).
X. Zheng, T. K. Carns, K. L. Wang, and B. Wu, Appl. Phys. Lett. 62, 504 (1993).
Author information
Authors and Affiliations
Additional information
Pis’ma Zh. Éksp. Teor. Fiz. 66, No. 11, 704–708 (10 December 1997)
Rights and permissions
About this article
Cite this article
Ivanov, D.Y., Morozov, S.V., Dubrovskii, Y.V. et al. On the electron mobility of δ layers in the presence of diamagnetic “ejection” of size-quantization levels. Jetp Lett. 66, 737–741 (1997). https://doi.org/10.1134/1.567590
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.567590