Experimental and Theoretical Investigations of Light Scattering in Fullerenes

富勒烯光散射的实验和理论研究

• 批准号: 9624102
• 负责人: Jose Menendez
• 金额: $ 9万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9624102&HistoricalAwards=false
• 关键词: Experimental; Theoretical; Investigations; Light; Scattering

9624102 Menendez: This project comprises an experimental/theoretical light scattering study of the dynamical and electronic properties of fullerenes. Experiments on systems ranging from molecular solids to isolated molecules in the vapor phase, using both resonance and off-resonance incident radiation, will elucidate the interplay between molecular vibrations and rotations, the effects of solid-state packing and disorder, and the electron/vibrational coupling. The experiments will be analyzed theoretically by means of first-principles calculations and powerful time-correlator techniques for light scattering. Results from this project will contribute to the understanding of technologically important problems, e.g. details of the dynamical Jahn-Teller interaction thought to be responsible for superconductivity in doped fullerenes, and will shed light on fundamental problems, such as vibrational localization induced by defects or anharmonicity. ***This project comprises an experimental/theoretical study of the properties of fullerenes, a new class of carbon-based materials. Fullerenes are of great scientific and technological interest due to their unusual properties and the possibility of important applications, ranging from superconductivity to the fabrication of diamond films. Experiments involving scattering of laser light will be performed on systems ranging from molecular to isolated molecules in the vapor phase, in order to elucidate the interplay between molecular vibrations and rotations, the effects of solid- state packing and disorder, and the interactions between the electrons and vibrations. The experiments will be interpreted theoretically by means of powerful computer techniques. The results will contribute to understanding of technologically important problems such as the quantum mechanical mechanisms responsible for superconductivity in fullerenes, and will also shed light on fundamental problems such as vibrational localization.***

9624102 Menendez：该项目包括对富勒烯动力学和电子特性的实验/理论光散射研究。使用共振和非共振入射辐射对从分子固体到气相中的孤立分子的系统进行实验，将阐明分子振动和旋转之间的相互作用、固态堆积和无序的影响以及电子/振动耦合。 实验将通过第一性原理计算和强大的光散射时间相关器技术进行理论分析。该项目的结果将有助于理解重要的技术问题，例如动力学 Jahn-Teller 相互作用的细节被认为是造成掺杂富勒烯超导性的原因，并将揭示一些基本问题，例如由缺陷或非谐性引起的振动局域化。 ***该项目包括对富勒烯（一种新型碳基材料）特性的实验/理论研究。 富勒烯由于其不寻常的特性和从超导到金刚石薄膜制造等重要应用的可能性而引起了巨大的科学和技术兴趣。 涉及激光散射的实验将在从气相分子到孤立分子的系统上进行，以阐明分子振动和旋转之间的相互作用、固态堆积和无序的影响以及电子之间的相互作用和振动。 这些实验将通过强大的计算机技术进行理论上的解释。 研究结果将有助于理解技术上重要的问题，例如负责富勒烯超导性的量子力学机制，并且还将阐明振动局域化等基本问题。***