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- W2315852480 startingPage "4382" @default.
- W2315852480 abstract "We report a comprehensive photoluminescence excitation (PLE) investigation of the deep iron acceptor in hexagonal GaN. PLE spectra of the ${mathrm{Fe}}^{3+}$ ${[}^{4}$ ${mathrm{T}}_{1}$ (G)${mathrm{ensuremath{-}}}^{6}$ ${mathrm{A}}_{1}$ (S)] luminescence in semi-insulating GaN samples reveal intracenter excitation processes via excited states of the ${mathrm{Fe}}^{3+}$ center. Zero-phonon lines resolved around 2.01 and at 2.731 eV are attributed to the $^{6}$ ${mathrm{A}}_{1}$ (S)${mathrm{ensuremath{-}}}^{4}$ ${mathrm{T}}_{2}$ (G) and the $^{6}$ ${mathrm{A}}_{1}$ (S)${mathrm{ensuremath{-}}}^{4}$ E(G) transition, respectively. A steplike excitation structure on the low-energy onset of the ${mathrm{Fe}}^{3+mathrm{/}2+}$ charge-transfer band is attributed to the formation of a (${mathrm{Fe}}^{3+}$,e,h) complex at 2.888 eV. We estimate a binding energy of 280 meV locating the deep ${mathrm{Fe}}^{3+mathrm{/}2+}$ acceptor level 3.17 eV above the valence-band maximum. In n-type GaN samples the ${mathrm{Fe}}^{3+}$ luminescence is excited by hole-transfer processes. The experimental results indicate that the internal reference rule fails for the GaN/GaAs heterostructure." @default.
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- W2315852480 date "1997-02-15" @default.
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- W2315852480 title "Excited states of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>in GaN" @default.
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- W2315852480 doi "https://doi.org/10.1103/physrevb.55.4382" @default.
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