title: Observation of High Angular Momentum Excitons in Cuprous Oxide.
abstract: The recent observation of dipole-allowed P excitons up to principal quantum numbers of n=25 in cuprous oxide has given insight into exciton states with unprecedented spectral resolution. While so far the exciton description as a hydrogenlike complex has been fully adequate for cubic crystals, we demonstrate here distinct deviations: The breaking of rotational symmetry leads to mixing of high angular momentum F and H excitons with the P excitons so that they can be observed in absorption. The F excitons show a threefold splitting that depends systematically on n, in agreement with theoretical considerations. From detailed comparison of experiment and theory we determine the cubic anisotropy parameter of the Cu(2)O valence band.
authors.affiliation: Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Thewes
authors.affiliation: Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Heckötter
authors.affiliation: Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Kazimierczuk
authors.affiliation: Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Aßmann
authors.affiliation: Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Fröhlich
authors.affiliation: Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Bayer
authors.affiliation: Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia.
authors.forename: M A
authors.initials: MA
authors.lastname: Semina
authors.affiliation: Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia.
authors.forename: M M
authors.initials: MM
authors.lastname: Glazov