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- W4206015785 abstract "Delafossite CuFeO2 has recently attracted considerable attention because of its complex phase transitions and practical applications. A thorough understanding of the optical properties of CuFeO2 is essential for its further exploration. In this paper, we investigated the temperature-dependent optical properties of CuFeO2 single crystals through Raman scattering spectroscopy and spectroscopic ellipsometry. The room temperature Raman scattering spectrum exhibited six phonon modes at approximately 352, 509, 692, 1000, 1052, and 1171 cm-1. Upon cooling across 11 K, which is the rhombohedral to monoclinic structural phase transition temperature, a softening of the Eg-symmetry 352 cm-1 mode and a hardening of the A1g-symmetry 692 cm-1 mode were observed. Moreover, analysis of the temperature-dependent real part of the dielectric function and direct band gap revealed anomalies at 11 K. These results demonstrate a profound connection between the structural phase transition, lattice dynamics, and electronic structure of CuFeO2 and provide key information for CuFeO2-based device design and fabrication." @default.
- W4206015785 created "2022-01-26" @default.
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- W4206015785 date "2021-01-01" @default.
- W4206015785 modified "2023-10-16" @default.
- W4206015785 title "Temperature-dependent optical properties of CuFeO<sub>2</sub> through the structural phase transition" @default.
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- W4206015785 doi "https://doi.org/10.1039/d1ra08096b" @default.
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