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- W2080746106 abstract "We present a charge self-consistent mesoscopic electronic-structure method for type-II broken-gap superlattices that is based on the multiband $kensuremath{cdot}p$ envelope-function method. This scheme avoids the separate classification and occupation of electron and hole states that causes the standard effective-mass theory to fail once conduction- and valence-band states strongly intermix. The computational efficiency of envelope-function methods is maintained. Free or bound charge-carrier redistributions can be taken into account self-consistently. With this method that we term as full-band envelope-function approach, we calculate effective band gaps, effective masses, and optical transition energies of InAs/GaSb superlattices as a function of the layer width. Good agreement with experiment is obtained. We also discuss semiconductor to semimetal transitions in wide layer structures. We find the charge carriers to form a two-dimensional gas of approximately massless Dirac particles at a critical layer width." @default.
- W2080746106 created "2016-06-24" @default.
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- W2080746106 date "2009-07-10" @default.
- W2080746106 modified "2023-09-26" @default.
- W2080746106 title "Full-band envelope-function approach for type-II broken-gap superlattices" @default.
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- W2080746106 doi "https://doi.org/10.1103/physrevb.80.035304" @default.
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