Exciton in a phonon field: With a generalized dynamical coherent potential approximation (DCPA)

被引：0
|
作者：
Kato, T [1 ]
Kobayashi, S [1 ]
机构：
[1] Electrotech Lab, Tsukuba, Ibaraki 3058564, Japan
来源：
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON EXCITONIC PROCESSES IN CONDENSED MATTER - EXCON '98 | 1998年 / 98卷 / 25期
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中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A dynamical coherent potential approximation (DCPA) is formulated within the Hartree approximation for a Frenkel exciton interacting with intramolecular phonons. This method is applied to calculations of two-photon absorption spectra in molecular J-aggregates. The two-photon absorption map and the two-exciton polaron dispersion are compared for pseudoisocyanine J-aggregates. A possibility to observe band-edge lowest two-exciton polarons by the two-photon absorption spectroscopy is pointed out.
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页码：495 / 500
页数：6
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