| Literature DB >> 20210348 |
Libai Huang1, Gregory V Hartland, Li-Qiang Chu, Randall M Feenstra, Chuanxin Lian, Kristof Tahy, Huili Xing.
Abstract
Transient absorption microscopy was employed to image charge carrier dynamics in epitaxial multilayer graphene. The carrier cooling exhibited a biexponential decay that showed a significant dependence on carrier density. The fast and slow relaxation times were assigned to coupling between electrons and optical phonon modes and the hot phonon effect, respectively. The limiting value of the slow relaxation time at high pump intensity reflects the lifetime of the optical phonons. Significant spatial heterogeneity in the dynamics was observed due to differences in coupling between graphene layers and the substrate.Entities:
Mesh：
Substances：
Year: 2010 PMID： 20210348 DOI： 10.1021/nl904106t
Source DB: PubMed Journal: Nano Lett ISSN： 1530-6984 Impact factor: 11.189