Electron-Phonon Interaction in Graphene/Polar Substrate Interface
Auger and electron-surface optical phonon interaction processes in monolayer graphene deposited on polar substrates.
(Sprache: Englisch)
This work focuses on the study of two processes; Auger and Diffusion of an electron-surface optical phonon (ESOP) in monolayer graphene on polar substrates such as silicon dioxide, silicon carbide, hafnium oxide, or hexagonal boron nitride. We showed that;...
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This work focuses on the study of two processes; Auger and Diffusion of an electron-surface optical phonon (ESOP) in monolayer graphene on polar substrates such as silicon dioxide, silicon carbide, hafnium oxide, or hexagonal boron nitride. We showed that; charge carrier relaxation channels are affected when deposing graphene on polar substrates. Thus, the fundamental physical mechanisms controlling the ultra-fast dynamics in graphene are influenced by the choice of polar substrate, temperature, charge carrier density, and the thickness of the graphene/polar substrate interface. The significant role of collinear and ultrafast scattering, enabling Auger processes, including charge multiplication, is a key to improving photovoltaic production and high sensitivity photo-detectors. In addition, we have shown that surface phonons of polar substrates produce an electric field that interacts with the electrons of the monolayer graphene deposited above. Indeed, the ESOP interaction causes a resonant coupling between the electron sublevels and the surface vibration modes inducing the increase of the Rabi splitting of the electrons energy levels in monolayer graphene on polar dielectrics.
Autoren-Porträt von Mounira Mahdouani-Bourguiga
Mahdouani-Bourguiga, MouniraMounira Mahdouani-Bourguiga: Doctor of Physics. Assistant Professor at IPEIB. Laboratory Physics of Materials, Structures, and Properties, Physical Group of Nanometric Components and Devices, Faculty of Sciences of Bizerte, University of Carthage, Tunisia. Her research is focused on the optical properties in monolayer graphene on polar dielectrics.
Bibliographische Angaben
- Autor: Mounira Mahdouani-Bourguiga
- 2020, 92 Seiten, Maße: 22 cm, Kartoniert (TB), Englisch
- Verlag: LAP Lambert Academic Publishing
- ISBN-10: 6203024651
- ISBN-13: 9786203024654
Sprache:
Englisch
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