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SUMMARY:Phonon anomalies in optical conductivity of graphene-based materia
 ls
DTSTART;VALUE=DATE-TIME:20111104T110000Z
DTEND;VALUE=DATE-TIME:20111104T120000Z
DTSTAMP;VALUE=DATE-TIME:20261010T144104Z
UID:indico-event-244@indico.ipb.ac.rs
DESCRIPTION:AbstractSingle and multilayer graphenes are among the most pro
 mising systems for the development of carbon-based devices in electronics.
  The detection and analysis of the spectral properties of optical phonons 
 in single- and multi-layer graphene provides a powerful tool not only for 
 investigating the role of the underlying electron-phonon interaction\, but
  also for a careful characterization of the systems. While large amount of
  work along this direction has initially focused on Raman spectroscopy\, p
 honon anomalies have been recently detected also in the infrared optical c
 onductivity of bilayer graphene\, revealing a remarkable tunable dependenc
 e of the intensity and of the Fano lineshape asymmetry on the external gat
 e voltage. In this talk I will present a simple theoretical framework whic
 h permits to understand at the same time the phonon intensity and the Fano
  lineshape asymmetry. A complete phase diagram of the optical phonon respo
 nse is also presented\, as a function of both the charge density and the b
 andgap\, showing a switching mechanism\, between the dominance of the Eu a
 nd Eg mode. controlled by the external gate voltage. The case of multilaye
 r graphene and graphite is also discussed.\n\nhttps://events.saifa.rs/even
 t/244/
LOCATION:Institute of Physics Belgrade Library
URL:https://events.saifa.rs/event/244/
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