K-dependent exchange interaction of quadrupole excitons in Cu2O

The long‐ and short‐range exchange interaction for the quadrupole allowed transition to the yellow 1S orthoexciton in Cu2O is derived. While the three orthoexciton states still remain degenerate, when treating the exchange up to the order of K‐linear terms, a fine structure arises when K‐quadratic t...

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Veröffentlicht in:	Phys. Status Solidi (b). Vol. 238, no. 3, pp. 541-547. 2003 no. 3, pp. 541-547. 2003, 2003-08, Vol.238 (3), p.541-547
Hauptverfasser:	Dasbach, G., Fröhlich, D., Stolz, H., Klieber, R., Suter, D., Bayer, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	71.35.Cc 78.20.-e 78.40.Fy Condensed matter: electronic structure, electrical, magnetic, and optical properties Electron states Exact sciences and technology Excitons and related phenomena Intrinsic properties of excitons optical absorption spectra Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Physics Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter
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Zusammenfassung:	The long‐ and short‐range exchange interaction for the quadrupole allowed transition to the yellow 1S orthoexciton in Cu2O is derived. While the three orthoexciton states still remain degenerate, when treating the exchange up to the order of K‐linear terms, a fine structure arises when K‐quadratic terms are included. This splitting is investigated experimentally by high resolution spectroscopy. Exchange contributions of few μeV are resolved and compared to theory. The impact of strain on the exciton fine structure is discussed and evaluated.
ISSN:	0370-1972 1521-3951
DOI:	10.1002/pssb.200303186