Assignment of the Even-Parity Excitons in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Cu</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>O

D. Fröhlich; R. Kenklies; Ch. Uihlein; C. Schwab

doi:10.1103/PhysRevLett.43.1260

Assignment of the Even-Parity Excitons in ${Cu}_{2}$ O

D. Fröhlich, R. Kenklies, Ch. Uihlein, and C. Schwab

Phys. Rev. Lett. 43, 1260 – Published 22 October 1979

Abstract

This Letter presents for the first time a detailed two-photon spectrum of the even-parity excitons of the yellow series in ${Cu}_{2}$ O. Contrary to one-photon data, it is possible to measure directly $S$ and $D$ exciton contributions without applying external perturbations. The two-photon spectrum gives evidence for a strong mixing between the yellow and the green series which is explained by exchange interaction and nondiagonal parts in the effective-mass Hamiltonian.

Received 9 August 1979

DOI:https://doi.org/10.1103/PhysRevLett.43.1260

Authors & Affiliations

D. Fröhlich, R. Kenklies, and Ch. Uihlein

Institut für Physik, Universität Dortmund, 46 Dortmund, Federal Republic of Germany

C. Schwab

Laboratoire de Spectroscopie et d'Optique du Corps Solide, Associé au Centre National de la Recherche Scientifique, Université Louis Pasteur, 67000 Strasbourg, France