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- W2023981645 abstract "Compositional and temperature-dependent Raman and infrared spectroscopies on the narrow-band-gap II-VI alloy, ${mathrm{Hg}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Cd}}_{mathit{x}}$Te (0ensuremath{le}xensuremath{le}0.29), are reported in this paper. Raman measurements over this composition range confirm the two-mode behavior of the optical phonons in the alloy, with the frequency positions exhibiting a monotonic change with the alloy composition x. A resonant enhancement of the HgTe-like forbidden longitudinal-optic mode is observed near the ${mathit{E}}_{1}$ band gap of the alloy. Alloy induced perturbations on the electronic states lead to a smearing and a weakening of the resonance with increasing alloy composition. The optical phonons in this small band-gap alloy exhibit anomalous frequency shifts as a function of temperature vis-`a-vis normal wide-band-gap semiconductors. This anomaly is attributed to the strong electron-phonon interaction in narrow-band-gap systems, which overshadows the dominant anharmonic (phonon-phonon) interaction in usual semiconductors. A detailed compositional dependent second-order Raman spectra is also reported." @default.
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- W2023981645 title "Composition and temperature-induced effects on the phonon spectra of narrow-band-gap<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Hg</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=italic>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:…" @default.
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- W2023981645 doi "https://doi.org/10.1103/physrevb.52.17172" @default.
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