Theoretical study of time-resolved photoemission spectroscopy for low-dimensional electron-phonon system

低维电子声子系统时间分辨光电子能谱理论研究

• 批准号: 21740222
• 负责人: LEE JaeDong
• 金额: $ 2.5万
• 依托单位: Japan Advanced Institute of Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740222/
• 关键词: 光物性; 超高速現象; 時間分解光電子分光; グラファイト; 電子・格子カップリング; ディラックフェルミオン; ブリュアンゾーンK点とH点; 光誘起超高速動力学; 非放射緩和; 光誘起絶縁体金属転移; コヒーレントフォノン; 電荷秩序の融解; 1次元有機絶縁体; バンドミキシング

Time-resolved photoemission spectroscopy (TRPES) is the state-of-the-art spectroscopy technology which makes it possible to monitor the real-time change of the electronic structure (especially, near the Fermi level) under the optical excitation. It is a challenge not only in experiment but also in theory in a sense that its theoretical formulation is still lacking. Through developing our original formulation, we theoretically study TRPES in 1-imensional organic insulator, and graphite, quasi 2-dimensional gapless semiconductor. Novel microscopic understanding about the effects of ultrafast dynamics of electron and phonon on the underlying electronic structure could be made.

时间分辨光谱学（TRPES）是最先进的光谱学技术，它可以实时监测光激发下电子结构（特别是费米能级附近）的变化。它不仅在实验上是一个挑战，而且在理论上也是一个挑战，从某种意义上说，它的理论表述仍然缺乏。通过发展我们的原始公式，我们从理论上研究了一维有机绝缘体、石墨、准二维无间隙半导体中的TRPES。对电子和声子的超快动力学对底层电子结构的影响有了新的微观认识。