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journal article·2015-08-01Open access

Lattice dynamics of KxRhO2 single crystals

Bin-Bin Zhang, NaNa Zhang, Song-Tao Dong, Yangyang Lv, Y. B. Chen, Shuhua Yao, Shan-Tao Zhang, Zheng-Bin Gu, Jian Zhou, Ilde Guedes, Dehong Yu, Yan-Feng Chen

AIP Advances· Volume 5· Issue 8
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Source abstract

Abstract

A series of crystals KxRhO2 (x = 0.72, 0.63, 0.55, 0.39, and 0.24) have been synthesized and their vibrational properties have been studied by first principles calculations, Raman spectroscopy, and inelastic neutron scattering. The measured vibrational spectra of KxRhO2 for x = 0.72 and 0.63 are consistent with the theoretical prediction for the stoichiometric KRhO2. For samples with x = 0.55, 0.39 and 0.24, extra vibrational modes have been observed and they are believed to be due to the symmetry reduction and the loss of translational symmetry induced by K disorder. The good agreement was found for the phonon density of states among the Raman spectroscopic observations, inelastic neutron scattering and the first principles calculations, as an evidence for the generation of structure disorder by K deficiency.
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Research context

OpenAlex topics: Advanced Condensed Matter Physics · Solid-state spectroscopy and crystallography · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Nanjing University 1 National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, , Nanjing 210093, China

Weifang University 2 College of Chemistry & Chemical and Environmental Engineering, , Weifang, 261061, China

Nanjing University 3 National Laboratory of Solid State Microstructure and Department of Physics, , Nanjing 210093, China

Universidade Federal do Ceará 4 Departamento de Física, , Campus do Pici, CP 6030, Fortaleza CE 60455-760, Brazil

Bragg Institute, Australian Nuclear Science and Technology Organisation 5 , Lucas Heights, NSW 2234, Australia

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