Vibrational Properties of a Two-Dimensional Silica Kagome Lattice.
basic_science · Level V
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- Record sourced from PubMed, PMID 28024359.
- Also identified by DOI 10.1021/acsnano.6b05577 and PMC identifier 5198257.
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Abstract
Kagome lattices are structures possessing fascinating magnetic and vibrational properties, but in spite of a large body of theoretical work, experimental realizations and investigations of their dynamics are scarce. Using a combination of Raman spectroscopy and density functional theory calculations, we study the vibrational properties of two-dimensional silica (2D-SiO<sub>2</sub>), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO<sub>2</sub> structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO<sub>2</sub> lattice is strongly influenced by phonon-phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiO<sub>2</sub> and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO<sub>2</sub>.