Temperaturabhängigkeit der Hyperfeinstrukturkonstanten von Mn<sup>2+</sup> in Znse

Koch, B.

doi:10.1002/pssb.2220430158

Cited by 2 publications

(3 citation statements)

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“…All normal coordinates must be taken into consideration. Therefore, equations (9) and (10) contain some other temperature functions than those Menne [5] obtained for symmetry 0,.…”

Section: F(t) Contains the Acoustic-phonon Contributionmentioning

confidence: 98%

“…We obtain where and If in (8) only the acoustical part is considered, an approxiniation can be obtained by expanding the spherical Bessel functions to second order in argument, which is true to low temperatures. Here we obtain the function given by Sirn&nek and Orbach [2] with the coefficient C which holds for the symnietry T, [9].…”

Section: F(t) Contains the Acoustic-phonon Contributionmentioning

confidence: 99%

“…Walsh et al [l] have measured the temperature dependence of the hyperfine coupling constant on Mn2+ in ZnS and Koch [9] has nieasured that dependence on Mn2+ in ZnSe. The measured values for ZnS:Mn2+ were reduced by Walsh et al to a constant volume at 300 K in order to describe the pure phonon effect.…”

Section: Comparison With the Experimentsmentioning

confidence: 99%

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Phonon‐induced hyperfine interactions for ⁶S‐state ions in tetrahedral symmetry: Mn²⁺ in ZnS and ZnSe

Koch

1975

Physica Status Solidi (b)

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On the basis of a point-charge model according to the theory of 8imBnek and Orbach equations are derived for the temperature dependence of the hyperfine coupling constant of %-state ions in tetrahedral symmetry without the approximation of small wave vectors for lattice phonons. Acoustical and optical phonons of the entire phonon spectrum are taken into consideration. The temperature functions calculated are compared with the measured values for ZnS:Mn2+ and ZnSe:Mn2+. The curves obtained very well correspond to the temperature dependence measured if always one parameter is taken from the experiment. The calculations, however, supply parameters which deviate by more than one order of magnitude from the experimental ones. The reasons for these deviations are particularly involved in the applied point-charge model. Auf der Basis eines Punktladungsmodells werden nach der Theorie von Sim&nek undOrbach Gleichungen fur die Temperat,urabhingigkeit der Hyperfeinstrukturkonstanten von %-Ionen in Tetraeder-Symmetrie ohne die Naherung kleiner Wellenvektoren fur die Gitterphononen ermittelt. Akustische und optische Phononen des gesamten Phononenspektrums werden berucksichtigt. Die berechneten Temperaturfunktionen werden mit vorliegenden MeBwerten fur ZnS :Mn2+ und ZnSe :Nn2+ verglichen. Die theoretischen Kurven stimmen gut mit den gemessenen Tempcraturabhangigkeiten iiberein, wenn jeweils ein Parameter aus dem Experiment entnommen wird. Die Rechnungcn liefern allerdings Parameter, die um mehr als eine GroBenordnung von den experimentellen abweichen. Die Griinde fur die Xbweichungen liege11 vor allem im benutzten I'unktladnngsrnodell.

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“…All normal coordinates must be taken into consideration. Therefore, equations (9) and (10) contain some other temperature functions than those Menne [5] obtained for symmetry 0,.…”

Section: F(t) Contains the Acoustic-phonon Contributionmentioning

confidence: 98%

Section: F(t) Contains the Acoustic-phonon Contributionmentioning

confidence: 99%