Elemental process of the electron-lattice interaction in carbon nanomaterial

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400326
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Osaka University
• Principal Investigator: TANAKA Shin-ichiro 大阪大学, 産業科学研究所, 准教授 (00227141)
• Co-Investigator(Kenkyū-buntansha): Maruyama Takahiro 名城大学, 理工学部, 教授 (30282338)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 電子格子相互作用 / グラフェン / 角度分解光電子分光 / シンクロトロン放射光 / フォノン分散 / 間接遷移

Outline of Final Research Achievements

The elemental process of the electron-lattice interaction is the electron transition as a result of the electron-phonon scattering. In this study, the process of the electron scattering by the phonon from the K-point to the neighborhood of the Gamma-point in the Brillouin zone of the graphite and single-layered graphene is, for the first time, observed by using the angle-resolved photoelectron spectroscopy in a way of resolving momentum and energy. Our finding is important because this reveals quantitatively the matrix element of the electron-phonon scattering which rules the electron-lattice interaction. Moreover, since the optical transition plays critical role in the whole process, we theoretically investigate the photoelectron excitation process in graphite and graphene.

Free Research Field

光物性