...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Theory of the broadening of vibrational spectra induced by lowered symmetry in yttria nanostructures
【24h】

Theory of the broadening of vibrational spectra induced by lowered symmetry in yttria nanostructures

机译：氧化钇纳米结构中对称性降低引起的振动光谱展宽理论

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We calculate the vibrational spectra for typical nanostructures including thin films, nanowires, and quantum dots of yttria, an important laser host material. Lattice dynamics calculations show that the vibrational spectra of nanocrystals are distinct from that of the bulk phase in the enhanced tails at low and high frequencies. Some of the low-frequency and high-frequency modes only involve surface atoms. Molecular-dynamics simulations are used to further decompose the contributions of surface and internal atoms, and the results confirm the evident broadening of the surface spectra. The broadening in vibrational spectra is attributed to the broadened atomic spring constants, further to the lowered symmetry of nanostructures.
机译：我们计算典型的纳米结构的振动光谱，包括薄膜，纳米线和氧化钇（一种重要的激光基质材料）的量子点。晶格动力学计算表明，在低频和高频下，纳米晶体的振动谱与增强尾部中的本体相的振动谱不同。某些低频和高频模式仅涉及表面原子。分子动力学模拟被用来进一步分解表面原子和内部原子的贡献，结果证实了表面光谱的明显加宽。振动光谱的扩大归因于原子弹簧常数的扩大，进一步归因于纳米结构对称性的降低。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号