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PbTe/Pb/sub 1-x/Sn/sub x/Te (x

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4 Author(s)
Kriechbaum, M. ; Inst. fur Theor. Phys., Graz Univ., Austria ; Kocevar, Peter ; Pascher, H. ; Bauer, G.

Theoretical and experimental investigations on a narrow-gap multiquantum well (MQW) system with a many-valley band structure: PbTe/PbSnTe are presented. This system has a number of interesting features, including weak confinement of electrons and strain splitting of equivalent L-states, comparable to the conduction-band discontinuities. The result of empirical tight-binding calculations, namely, a type I band alignment, is confirmed by magnetooptical investigations in both magnetic-field orientations parallel and perpendicular to the layers. An envelope function calculation including quantizing magnetic fields is used for the analysis.<>

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Quantum Electronics, IEEE Journal of  (Volume:24 ,  Issue: 8 )