Resonant impurity bands in semiconductor superlattices |
| |
Authors: | Stehr Dominik Metzner Claus Helm Manfred Roch Tomas Strasser Gottfried |
| |
Institution: | Institute of Ion Beam Physics and Materials Research, Forschungszentrum Rossendorf, P.O. Box 510119, 01314 Dresden, Germany. d.stehr@fz-rossendorf.de |
| |
Abstract: | It is shown that the confined impurity state of a semiconductor quantum well develops into an excited impurity band in the case of a superlattice. This is studied by following theoretically the transition from a single to a multiple quantum well or superlattice by exactly diagonalizing the three-dimensional Hamiltonian for a quantum well system with random impurities. Intersubband absorption experiments, which can be nearly perfectly reproduced by the theory, corroborate this interpretation, which also requires reinterpretation of previous data. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|