Crystal and electronic structure of PbTe/CdTe nanostructures
1 Institute of Physics PAS, Al. Lotnikow 32/46, 02-668 Warsaw, Poland
2 Institute of Informatics, University of Warsaw, St. Banacha 2, 02-097 Warsaw, Poland
Nanoscale Research Letters 2011, 6:126 doi:10.1186/1556-276X-6-126Published: 10 February 2011
In this article, the authors reported a theoretical study of structural and electronic properties of PbTe inclusions in CdTe matrix as well as CdTe nano-clusters in PbTe matrix. The structural properties are studied by ab initio methods. A tight-binding model is constructed to calculate the electron density of states (DOS) of the systems. In contrast to the ab initio methods, the latter allows studying nanostructures with diameters comparable to the real ones. The calculations show that both kinds of inclusions lead to changes of the DOS of the carriers near the Fermi level, which may affect optical, electrical and thermoelectric properties of the material. These changes depend on the size, shape, and concentration of inclusions.