期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
卷 21, 期 8-9, 页码 1388-1397出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217979207042884
关键词
heterostructures; quantum Hall effect
Two-dimensional electrons in an AlAs quantum well occupy multiple conduction-band minima at the X-points of the Brillouin zone. These valleys have large effective mass and g-factor compared to the standard GaAs electrons, and are highly anisotropic. With proper choice of well width and by applying symmetry-breaking strain in the plane, one can control the occupation of different valleys thus rendering a system with tuneable effective mass, g-factor, Fermi contour anisotropy and valley degeneracy. Here we review some of the rich physics that this system has allowed us to explore.
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