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：该项目包括富勒烯的动力学和电子特性的实验/理论光散射研究。实验系统范围从分子固体孤立分子在气相中，使用共振和非共振入射辐射，将阐明分子振动和旋转之间的相互作用，固态包装和无序的影响，以及电子/振动耦合。 实验将通过第一性原理计算和光散射的强大的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技术上的重要问题，例如被认为是掺杂富勒烯超导性的动力学Jahn-Teller相互作用的细节，并将揭示基本问题，例如由缺陷或非谐性引起的振动定位。 * 该项目包括对富勒烯（一类新的碳基材料）的性质进行实验/理论研究。 富勒烯是巨大的科学和技术的兴趣，由于其不寻常的性能和重要应用的可能性，从超导到金刚石薄膜的制造。 涉及激光散射的实验将在气相中从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，固态包装和无序的影响，以及电子和振动之间的相互作用。 实验将通过强大的计算机技术进行理论解释。 这些结果将有助于理解技术上重要的问题，如富勒烯中超导性的量子力学机制，也将揭示振动局域化等基本问题。