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Two‐Photon Absorption by Envelope–Hole Coupled Exciton States in Cubic ZnSe. I. Energy Spectrum of the H d Term and Valence‐Band Parameters
Author(s) -
Sondergeld M.
Publication year - 1977
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/pssb.2220810127
Subject(s) - exciton , hamiltonian (control theory) , atomic physics , physics , valence (chemistry) , biexciton , fine structure , photon energy , effective mass (spring–mass system) , absorption spectroscopy , photon , condensed matter physics , quantum mechanics , mathematical optimization , mathematics
In the exciton spectrum of cubic ZnSe a fourfold energy splitting of the 2P exciton is observed by two‐photon absorption. The distinct fine structure is the first experimental evidence for the coupling between the exciton envelope and the total hole spin. The energy spectrum of the spin Hamiltonian for Wannier excitons is calculated by use of a variational technique. Hydrogenic p‐ and f‐like trial functions are introduced as solutions, and the two equivalent Bohr radii are treated as independent variational parameters. First experimental data of the hole effective‐mass parameters for the Γ 8 valence band are deduced from the observed energy splitting.