@inproceedings{b7a2295e76324ddd915267194c941f51,

title = "Quantum confined stark effect in embedded PbTe nanocrystals",

abstract = "We investigate structural and electronic properties of PbTe nanocrys-tals (NCs) embedded in a CdTe matrix using an ab initio pseudopotential method and a repeated super cell approximation. The dot-matrix interface structure was found to be in good agreement with observations at planar PbTe/CdTe interfaces. In particular the so called rumpling effect at Te-terminated {100}PbTe/CdTe interfaces is of the same order of magnitude. Calculations concerning the stability of the embedded PbTe NCs confirm the assumption of a rhombo-cubo-octahedron equilibrium crystal shape (ECS). The occurrence of internal electrostatic fields as a consequence of the polar dot-matrix interfaces is demonstrated. The resulting internal quantum confined Stark effect (IQCSE) leads to a spatial separation of electron and hole wavefunctions in the NCs and, hence, to a reduction of the optical oscillator strength at low temperatures.",

author = "R. Leitsmann and F. Ortmann and F. Bechstedt",

year = "2009",

doi = "10.1007/978-3-540-88303-6_5",

language = "English",

isbn = "9783540883012",

series = "High Performance Computing in Science and Engineering 2008 - Transactions of the High Performance Computing Center Stuttgart, HLRS 2008",

publisher = "Springer Verlag",

pages = "59--70",

booktitle = "High Performance Computing in Science and Engineering 2008 - Transactions of the High Performance Computing Center Stuttgart, HLRS 2008",

note = "11th Results and Review Workshop on High Performance Computing in Science and Engineering, HLRS 2008 ; Conference date: 29-09-2008 Through 30-09-2008",

}