Superlattice (SL) devices such as infrared detectors and quantum-cascade lasers rely on efficient transport of carriers perpendicular to the SL layers by drift and/or diffusion. While horizontal mobilities are measured routinely, measurements of perpendicular-carrier mobilities require nonstandard experimental techniques such as the geometric magneto-resistance. Here we show how perpendicular mobilities can be estimated from horizontal mobility measurements and calculated mobilities. We treat low-temperature horizontal and vertical transport in SL on ...
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