The dynamics of hot phonons in supported, suspended,and gatedmonolayer graphene was studied by using time-resolved anti-StokesRaman spectroscopy. We found that the hot phonon relaxation is dominatedby phonon–phonon interaction in graphene, and strongly affectedby the interaction between graphene and ...
Overall, our results demonstrate how a treatment of the dynamics of both hot carriers and hot phonons is essential to understanding the properties of functional graphene superlattices.Similar content being viewed by others Phonon-mediated room-temperature quantum Hall transport in graphene Article Open ...
Graphene/TiO2 – 9 0.16 Hot carrier multiplication on graphene [256] Merbromin/Au/TiO2 – 100 18 Detection of hot electron flow from dye molecules [257] 5.3 Local detection of surface plasmon induced hot electrons Despite broad applications of surface plasmon-driven hot electrons in fields of op...
Optical phonon cooling on short time scales is found to be independent of the graphene growth technique, the number of layers, and the type of the substrate. We find average phonon lifetimes in the 2.5–2.55 ps range. We model the relaxation dynamics of the coupled carrier-phonon system with...
in graphene thermalize much faster via electron–electron and optical phonon scattering than acoustic phonon scattering23,24,25,26, the heated electrons first reach equilibrium with optical phonons in graphene and hBN, coupling more slowly to the acoustic phonon bath by thermal conductanceγe. The ...
标题:Remarkable electron and phonon transports in low-cost SnS: A new promising thermoelectric material 作者:Wenke He, Ran Ang, Li-Dong Zhao 链接:https://www.sciengine.com/doi/10.1007/s40843-021-1945-1 DOI:10.1007/s40843-021-1945-1
标题:Engineering phonon thermal transport in few-layer PdSe2 作者:Meilin Li, Huanhuan Sun, Jun Zhou, Yunshan Zhao 卷号:Frontiers of Physics , 2024, 19(3): 33203. 链接:https://journal.hep.com.cn/fop/EN/10.1007/s11467-023-1351-x ...
environment and forms the tightly bound interlayer excitons within 800 fs, and a small portion of the hot excitons recombines with 13 ps because of defects or phonon scattering. The signal enhancement within 50 fs of the heterostructure (Figs 2eand3c) and the decay dynamics of the ...
The dynamics of hot electrons are central to understanding the properties of many electronic devices. But their ultra-short lifetime, typically 100 fs or less, and correspondingly short transport length-scale in the nanometre range constrain real-space investigations. Here we report variable temperat...
Multi-Pulse Terahertz Spectroscopy Unveils Hot Polaron Photoconductivity Dynamics in Metal-Halide Perovskites The behavior of hot carriers in metal-halide perovskites (MHPs) present a valuable foundation for understanding the details of carrier-phonon coupling in the materials as well as the prospective de...