Wave-vector-dependent exciton exchange interaction |
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| Authors: | Dasbach G Fröhlich D Stolz H Klieber R Suter D Bayer M |
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| Affiliation: | Institut für Physik, Universit?t Dortmund, D-44221 Dortmund, Germany. |
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| Abstract: | The exchange interaction for the yellow 1S orthoexciton in Cu2O is derived up to the order K2. The resulting exchange splittings are verified experimentally using high resolution spectroscopy. In agreement with theory the fine structure shows a characteristic dependence on the direction of the wave vector. |
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