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The group IB impurities (Cu, Ag, and Au) incorporated into II-VI zinc blendehosts of ZnTe and CdTe exhibit well resolved excitation lines followed by aphotoionization continuum in their infrared absorption spectra. They areassociated with transitions from a "1s-like" ground state to various "p-like"excited state characteristic of a hole bound to a Coulomb center. Their spacingagree well with those predicted in the effective mass theory for singleacceptors as expected for group IB elements substitutionally replacing thegroup IIB cations of the host. The occurrence of the simultaneous excitation ofthe Lyman transitions in combination with the zone center longitudinal opticalphonon and hence lying in the photoionization continuum and displayingFano-like asymmetries are features described and interpreted.

Lyman spectra of holes bound to Cu, Ag, and Au acceptors in ZnTe and CdTe