Premium
Festschrift: Excitons and Many‐Particle Effects in Semiconductors and Semiconductor Nanostructures in honour of Roland Zimmermann
Author(s) -
Runge E.,
May V.
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200211)234:1<1::aid-pssb1>3.0.co;2-u
Subject(s) - exciton , physics , honour , condensed matter physics , semiconductor , delocalized electron , atomic physics , quantum mechanics , archaeology , history
Resonant secondary emission at the disorder‐broadened exciton transition is a fundamental process studied by ultra‐fast spectroscopy on high‐quality quantum wells. A quantitative interpretation is provided by the speckle analysis pioneered by Langbein, Zimmermann, and collaborators. The background panels show emission intensities versus time and scattering angle; from Langbein [1]. A theoretical understanding can be obtained via the steps symbolized by the front panels and systematically pursued by Roland Zimmermann's group during the last decade: (i) The interface disorder (characterized by the island size ζ , a few atoms) can be mapped onto (ii) an Anderson disorder model for the center‐of‐mass motion with energy fluctuations V ( R ) correlated over distances of the order of the exciton radius a B . Numerical simulations of the disorder‐localized eigenstates yield, e. g., (iii) distributions of radiative life times r α – and, thus, predict secondary emission properties; details and calculation parameters in Savona and Runge [2] and Refs. [6, 10, 20, 23] therein. In this way, the figure covers many aspects of the work of Roland Zimmermann, Professor of Theoretical Physics at the Humboldt‐Universität zu Berlin, to whom this special issue of physica status solidi (b) is dedicated on the occasion of his 60th birthday.