Title

Time-dependent density-matrix functional theory for biexcitonic phenomena

Authors

Authors

V. Turkowski; C. A. Ullrich; T. S. Rahman;M. N. Leuenberger

Comments

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Abbreviated Journal Title

Phys. Rev. B

Keywords

EXCITONIC MOLECULES; BINDING-ENERGY; MANY-BODY; CDS; SEMICONDUCTORS; EXCITATIONS; SYSTEMS; ZNO; Physics, Condensed Matter

Abstract

We formulate a time-dependent density-matrix functional theory (TDDMFT) approach for higher-order correlation effects like biexcitons in optical processes in solids based on a reduced two-particle density-matrix formalism within the normal orbital representation. A TDDMFT version of the Schrodinger equation for biexcitons in terms of one- and two-body reduced density matrices is derived, which leads to finite biexcitonic binding energies already with an adiabatic approximation. Biexcitonic binding energies for several bulk semiconductors are calculated using a contact biexciton model.

Journal Title

Physical Review B

Volume

82

Issue/Number

20

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

6

WOS Identifier

WOS:000284306400008

ISSN

1098-0121

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