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Two-dimensional electrons occupying multiple valleys in AlAs | | M. Shayegan
; E. P. De Poortere
; O. Gunawan
; Y. P. Shkolnikov
; E. Tutuc
; K. Vakili
; | | Date: |
6 Jun 2006 | | Abstract: | Two-dimensional electrons in AlAs quantum wells 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 stan-dard GaAs electrons, and are also 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. | | Source: | arXiv, cond-mat/0606158 | | Services: | Forum | Review | PDF | Favorites | |
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