Resumo

COYOTECATL, H.A. et al. Bulk anisotropic excitons in type-II semiconductors built with 1D and 2D low-dimensional structures. Rev. mex. fis. [online]. 2005, vol.51, n.4, pp.387-390. ISSN 0035-001X.

We used a simple variational approach to account for the difference in the electron and hole effective masses in Wannier-Mott excitons in type-II semiconducting heterostructures in which the electron is constrained in an one-dimensional quantum wire (1DQW) and the hole is in a two-dimensional quantum layer (2DQL) perpendicular to the wire or viceversa. The resulting Schrödinger equation is similar to that of a 3D bulk exciton because the number of free (nonconfined) variables is three; two coming from the 2DQL and one from the 1DQW. In this system the effective electron-hole interaction depends on the confinement potentials.

Palavras-chave : Groundstate energy of screened excitons; low-dimensional structures; semiconductors.

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