Zero phonon lines of the M-center in ZnS crystals

Hoffmann, A.; Broser, I.; Thomsen-Schmidt, Peter

doi:10.1016/0022-2313(88)90213-x

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…22,23 These authors observed a line in the blue part of the spectrum that complements the red line, corresponding to an impurity intracenter transition, just to the forbidden energy gap. The model proposed in the previous papers of the current authors 24,25 presents a consistent explanation of this sum rule in the luminescence spectra of these systems.…”

Section: Introductionmentioning

confidence: 96%

Possibility of a metastable state for a transition-metal impurity in semiconductor

Dahan

Fleurov

1996

Phys. Rev. B

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A transition-metal impurity in a semiconductor can be shifted from its high symmetry substitutional position due to the Jahn-Teller interaction. An interplay of the spin-orbit and Jahn-Teller interactions may lead to a double-well potential for such an impurity in the configuration coordinates. One of these new states can be metastable and characterized by extremely long relaxation time especially at low temperatures. This allows us to explain the observation of the line complementing the intracenter transition line to the forbidden energy gap both in the luminescence and in the photoluminescence excitaton spectra. Various other puzzling experimental observations are discussed and explained on the basis of this mechanism.

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Section: Introductionmentioning

confidence: 96%

Possibility of a metastable state for a transition-metal impurity in semiconductor

Dahan

Fleurov

1996

Phys. Rev. B

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The sum rule for the luminescence of semiconductors doped with transition metal impurities

Dahan¹,

Fleurov²

1994

J. Phys.: Condens. Matter

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A theory of two complementing luminescence lines observed in some AIIBVI semiconductors doped with transition metal impurities is proposed. The first line is known to be attributable to an intracentre transition; the second line appears as a result of a second-order process of interference between radiative and non-radiative transitions with participation of the d shells of the impurity atoms. A detailed calculation of the intensity of such a process is presented. It is shown that the specific resonance can make this second-order process quite strong if the impurity-phonon coupling is strong enough. The possibility of observing pairs of complementing lines in various AIIBVI and AIIIBV systems is discussed. Some unresolved problems associated with the effect are also touched upon.

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Fe3+as near-infrared luminescence center in ZnS

1990

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A richly structured luminescence is observed in the 1.2-pm spectral region in "pure" and Fedoped ZnS crystals for the first time. By means of emission, excitation, and magneto-optical measurements an unambiguous assignment to the Tl (G)-A 1(S) transition of isolated Fe + on Zn + lattice sites becomes possible. Basic arguments are the sixfold degeneracy of the ground state with an isotropic g factor of 2.026+0.010, the long decay time of about 4 ms, and the influence of additional iron doping. The excitation mechanism can be described by an energy transfer via free holes from hC u + to Fe' centers and a charge-transfer process Fe':Fe'++Ave (VB denotes valence band). A comparison with the well-known isoelectronic Mn + centers reveals striking similarities.The numerous zero-phonon lines at T =1.8 K are due to the polytypic structure of the investigated crystals, offering several different Zn' lattice sites. The observed fine structures of the Tl(G) terms and their behavior in a magnetic field indicate a strong Jahn-Teller coupling to E modes as is known for the Mn + centers.

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Zero phonon lines of the M-center in ZnS crystals

Cited by 4 publications

References 2 publications

Possibility of a metastable state for a transition-metal impurity in semiconductor

Possibility of a metastable state for a transition-metal impurity in semiconductor

The sum rule for the luminescence of semiconductors doped with transition metal impurities

Fe3+as near-infrared luminescence center in ZnS

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