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HL: Halbleiterphysik

HL 23: Poster II

HL 23.15: Poster

Mittwoch, 24. März 1999, 14:00–18:00, Z

Wigner Eisenbud functions and transport in quantum structures — •P.N. Racec^1,2, U. Wulf¹, and J. Kučera^1,3 — ¹Brandenburgische Technische Universität Cottbus Fakultät 1, Postfach 101344, 03013 Cottbus — ²Institute of Physics and Technology of Materials, Bucharest, PO Box Mg7, 76900 Bucharest, Romania — ³Institute of Physics, Academy of Science of the Czech Republic, Cukrovarnickà 10, 162 53 Praha 6, Czech Republic

We present the application of the R-matrix formalism to the calculation of the self-consistent potential in current carrying quantum structures. It is shown that the Wigner-Eisenbud functions used in the R-matrix formalism are suitable functions to describe the transport problem: First, they constitute an orthonormal function system in which the expansion of the electron density converges rapidly, so that for a good description only very few basis functions are necessary. Second, they provide a natural representation of the quasibound states which may form in either the emitter contact or in the center of the tunneling structure as resonant state.