Abbreviated Journal Title
Phys. Rev. B
EXCITONIC MOLECULES; BINDING-ENERGY; MANY-BODY; CDS; SEMICONDUCTORS; EXCITATIONS; SYSTEMS; ZNO; Physics, Condensed Matter
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.
Physical Review B
Turkowski, Volodymyr; Ullrich, Carsten A.; Rahman, Talat S.; and Leuenberger, Michael N., "Time-dependent density-matrix functional theory for biexcitonic phenomena" (2010). Faculty Bibliography 2010s. 872.