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), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO lattice is strongly influenced by phonon-phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiO and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5198257 | PMC |
| http://dx.doi.org/10.1021/acsnano.6b05577 | DOI Listing |
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