Saibal Dasgupta

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We studied a doping series of 110 -oriented AlAs quantum wells QWs and observed transport evidence of single anisotropic-mass valley occupancy for the electrons in a 150 Å wide QW. Our calculations of strain and quantum confinement for these samples predict single anisotropic-mass valley occupancy for well widths W greater than 53 Å. Below this,(More)
InAs - AlSb HEMTs stressed with hot electrons may exhibit shifts in the peak transconductance towards more negative gate voltages. The devices are most degradation prone in operating conditions with high vertical gate field. Annealing trends and theoretical calculations indicate the possible role of an oxygen-induced metastable defect.
Forests are ecological as well as socio-economic resource. These have to be managed judiciously not only for environmental protection and other services but also for various products and industrial raw materials. Considering the crucial role forests play in the country’s ecological stability and economic development, the current National Forest Policy(More)
T. Windisch,1 X. Huang,1 S. Dasgupta,2 B. Rupprecht,1 Ch. Heyn,3 M. Bichler,2 A. Fontcuberta i Morral,2,4 M. Grayson,5 G. Abstreiter,2 M. A. Wilde,1,* and D. Grundler1 1Physik Department, Lehrstuhl für Physik funktionaler Schichtsysteme, Technische Universität München, James-Franck-Str. 1, D-85747 Garching b. München, Germany 2Walter Schottky Institut,(More)
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