Vibrational Properties of a Two-Dimensional Silica Kagome Lattice
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- 作者：Torbjörn BjörkmanViera Skakalova ; Simon Kurasch ; Ute Kaiser ; Jannik C. Meyer ; Jurgen H. Smet ; Arkady V. Krasheninnikov
- 刊名：ACS Nano
- 出版年：2016
- 出版时间：December 27, 2016
- 年：2016
- 卷：10
- 期：12
- 页码：10929-10935
- 全文大小：2066K
- ISSN：1936-086X
文摘
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-SiOb>2 b>), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiOb>2 b> structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiOb>2 b> lattice is strongly influenced by phonon–phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiOb>2 b> and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiOb>2 b>.