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Transversal–Longitudinal Splittings of Quadrupole‐Active Exciton Level in Cu 2 O Crystal
Author(s) -
Moskalenko S.A.,
Bobrysheva A.I.,
Kiselyova E.S.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199906)213:2<377::aid-pssb377>3.0.co;2-4
Subject(s) - exciton , quadrupole , dipole , transversal (combinatorics) , condensed matter physics , physics , crystal (programming language) , wave vector , irreducible representation , atomic physics , quantum mechanics , mathematics , mathematical analysis , computer science , programming language
Transversal‐longitudinal splittings of the components of the quadrupole‐active exciton level characterized by irreducible representation Γ + 5 in Cu 2 O crystal were deduced. They arise due to long‐range dipole–dipole interaction. The transition dipole moments are proportional to the components of the exciton wave vector and essentially depend on the direction of light propagation in the crystal as regards the crystallographic directions. These transversal–longitudinal splittings unlike the case of dipole‐active exciton levels, turn to be zero when the exciton wave vector tends to zero.