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Level repulsion in excitonic spectra of disordered systems and local relaxation kinetics
Author(s) -
Runge Erich,
Zimmermann Roland
Publication year - 1998
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/(sici)1521-3889(199811)7:5/6<417::aid-andp417>3.0.co;2-5
Subject(s) - exciton , spectral line , relaxation (psychology) , phonon , condensed matter physics , scattering , radiative transfer , physics , wave function , quantum , materials science , quantum mechanics , psychology , social psychology
A thorough understanding of the excitonic spectra from quantum wells with rough interfaces or alloy disorder requires large‐scale numerical simulations with detailed modeling of the underlying quantum mechanics of exciton localization and relaxation. We discuss various numerical aspects of the calculation of wave functions, phonon transition rates and radiative lifetimes, as well as absorption and luminescence spectra. We argue, that spatially and energetically resolved spectra yield information on wave function size and localization character and discuss phonon scattering between disorder eigenstates for the limit of small energy transfer which is relevant at low temperatures.