COST Action [MP1306]

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COST Action [MP1306]

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Publications

Dispersion and damping of the interband pi plasmon in graphene grown on Cu(111) foils

Politano, Antonio; Radović, Ivan; Borka, Duško; Mišković, Zoran L.; Yu, H. K.; Farias, D.; Chiarello, G.

(2017)

TY  - JOUR
AU  - Politano, Antonio
AU  - Radović, Ivan
AU  - Borka, Duško
AU  - Mišković, Zoran L.
AU  - Yu, H. K.
AU  - Farias, D.
AU  - Chiarello, G.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1414
AB  - By means of angle-resolved electron energy loss spectroscopy, we have measured the interband it plasmon in high-quality graphene grown on peeled-off epitaxial Cu(111) foils. Experimental loss spectra have been reproduced by means of a hydrodynamic model. The dispersion relation of the plasmon frequency shows a nearly-flat dispersion up to a critical wave-vector of 0.3 angstrom(-1). We propose that the observed behavior could be originated by confinement effects in ripples in the strained graphene sheet. Strain also limits the dispersion at higher momenta, as a consequence of the increased effective mass of charge carriers. The analysis of momentum dependence of the line-width and of the inverse quality factor indicates that damping processes are dominated by decay in electron-hole pairs via indirect interband transitions. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Carbon
T1  - Dispersion and damping of the interband pi plasmon in graphene grown on Cu(111) foils
VL  - 114
SP  - 70
EP  - 76
DO  - 10.1016/j.carbon.2016.11.073
ER  - 
@article{
author = "Politano, Antonio and Radović, Ivan and Borka, Duško and Mišković, Zoran L. and Yu, H. K. and Farias, D. and Chiarello, G.",
year = "2017",
abstract = "By means of angle-resolved electron energy loss spectroscopy, we have measured the interband it plasmon in high-quality graphene grown on peeled-off epitaxial Cu(111) foils. Experimental loss spectra have been reproduced by means of a hydrodynamic model. The dispersion relation of the plasmon frequency shows a nearly-flat dispersion up to a critical wave-vector of 0.3 angstrom(-1). We propose that the observed behavior could be originated by confinement effects in ripples in the strained graphene sheet. Strain also limits the dispersion at higher momenta, as a consequence of the increased effective mass of charge carriers. The analysis of momentum dependence of the line-width and of the inverse quality factor indicates that damping processes are dominated by decay in electron-hole pairs via indirect interband transitions. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Carbon",
title = "Dispersion and damping of the interband pi plasmon in graphene grown on Cu(111) foils",
volume = "114",
pages = "70-76",
doi = "10.1016/j.carbon.2016.11.073"
}
Politano, A., Radović, I., Borka, D., Mišković, Z. L., Yu, H. K., Farias, D.,& Chiarello, G.. (2017). Dispersion and damping of the interband pi plasmon in graphene grown on Cu(111) foils. in Carbon, 114, 70-76.
https://doi.org/10.1016/j.carbon.2016.11.073
Politano A, Radović I, Borka D, Mišković ZL, Yu HK, Farias D, Chiarello G. Dispersion and damping of the interband pi plasmon in graphene grown on Cu(111) foils. in Carbon. 2017;114:70-76.
doi:10.1016/j.carbon.2016.11.073 .
Politano, Antonio, Radović, Ivan, Borka, Duško, Mišković, Zoran L., Yu, H. K., Farias, D., Chiarello, G., "Dispersion and damping of the interband pi plasmon in graphene grown on Cu(111) foils" in Carbon, 114 (2017):70-76,
https://doi.org/10.1016/j.carbon.2016.11.073 . .
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