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

Article

关键词: ZINC TELLURIDE;    SOLAR-CELLS;    STATES;    SEMICONDUCTORS;    ABSORPTION;    CDS/CDTE;    SILICON;    IDENTIFICATION;    SPECTROSCOPY;    RESONANCES;   

DOI  :  10.1103/PhysRevB.85.165210

来源: SCIE

【 摘 要 】

The group IB impurities (Cu, Ag, and Au) incorporated into the II-VI zinc blende hosts, ZnTe and CdTe, exhibit in their infrared absorption spectra well-resolved excitation lines followed by a photoionization continuum. They are due to electric dipole transitions from the 1s-like ground state to the various p-like excited states characteristic of a hole bound to a Coulomb center. Their spacings agree well with those predicted in the effective mass theory for single acceptors as expected for group IB elements substitutionally replacing the group IIB cations of the host. The simultaneous excitation of a Lyman transition in combination with the zone center longitudinal optical phonon, hence lying in the photoionization continuum, displays Fano-like asymmetry. The large chemical shift of the 1s ground states results in the pronounced shift of a Lyman line of a given acceptor with respect to the corresponding Lyman line of another acceptor in the same host.

【 授权许可】

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