Temperature-dependent optical properties of CuFeO₂ through the structural phase transition.

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 E _g-symmetry 352 cm^-1 mode and a hardening of the A

SUBMITTER: Chen HW 

PROVIDER: S-EPMC9044534 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature