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- W1636738723 abstract "Optical absorption results on single-crystal samples of ${mathrm{Cd}}_{1mathrm{ensuremath{-}}mathrm{x}}$${mathrm{Mn}}_{mathrm{x}}$Se are presented. Data were taken over the range 1.5--2.5 eV. Measurements were made at 300 and 195 K, liquid-nitrogen, and liquid-helium temperatures on samples with nominal manganese concentrations x=0.30, 0.42, and 0.45. Dichroism associated with the fundamental edge was found for all x and T studied. Onset of a strong absorption below the intrinsic edge is seen at ensuremath{sim}2.3 eV in high-x material; this feature is associated with excitation of a 2.13-eV emission band and is therefore identified as the threshold of the $^{6}mathrm{A}_{1}$(${mathrm{}}^{6}$S)ensuremath{rightarrow}${mathrm{}}^{4}$${mathrm{T}}_{1}$( $^{4})$ transition of ${mathrm{Mn}}^{2+}$ in the 3${d}^{5}$ configuration. We report an additional absorption feature of the order ensuremath{alpha}ensuremath{sim}1 ${mathrm{cm}}^{mathrm{ensuremath{-}}1}$ extending from 2.3 to ensuremath{sim}1.5 eV; we associate this feature in part with the excitation of a 1.35-eV emission band discussed earlier in the literature. The band-edge dichroism, taken as a measure of the crystal-field splitting, is found to decrease with increasing x, as reported in earlier electroreflectance results. In contrast with the electroreflectance data, however, a strong temperature dependence of the dichroism occurs near the upper limit (xensuremath{sim}0.45) of the single-phase wurtzite region. Possible mechanisms for this result are discussed." @default.
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- W1636738723 date "1985-10-15" @default.
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- W1636738723 title "Optical absorption studies in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Cd</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=normal>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Mn</mml:mi></mml:mrow><mml:mrow…" @default.
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- W1636738723 doi "https://doi.org/10.1103/physrevb.32.5202" @default.
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