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Scientific paper - Original scientific paper
Two-dimensional and π plasmon spectra in pristine and doped graphene
Physical review B: Condensed matter and materials physics, 87 (2013), 7; 075447. https://doi.org/10.1103/PhysRevB.87.075447
Despoja, Vito; Novko, Dino; Dekanić, Krešimir; Šunjić, Marijan; Marušić, Leonardo

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Despoja, V., Novko, D., Dekanić, K., Šunjić, M. & Marušić, L. (2013). Two-dimensional and π plasmon spectra in pristine and doped graphene. Physical review B: Condensed matter and materials physics, 87. (7). doi: 10.1103/PhysRevB.87.075447

Despoja, Vito, et al. "Two-dimensional and π plasmon spectra in pristine and doped graphene." Physical review B: Condensed matter and materials physics, vol. 87, no. 7, 2013. https://doi.org/10.1103/PhysRevB.87.075447

Despoja, Vito, Dino Novko, Krešimir Dekanić, Marijan Šunjić and Leonardo Marušić. "Two-dimensional and π plasmon spectra in pristine and doped graphene." Physical review B: Condensed matter and materials physics 87, no. 7 (2013). https://doi.org/10.1103/PhysRevB.87.075447

Despoja, V., et al. (2013) 'Two-dimensional and π plasmon spectra in pristine and doped graphene', Physical review B: Condensed matter and materials physics, 87(7). doi: 10.1103/PhysRevB.87.075447

Despoja V, Novko D, Dekanić K, Šunjić M, Marušić L. Two-dimensional and π plasmon spectra in pristine and doped graphene. Physical review B: Condensed matter and materials physics [Internet]. 2013 [cited 2024 December 23];87(7). doi: 10.1103/PhysRevB.87.075447

V. Despoja, D. Novko, K. Dekanić, M. Šunjić and L. Marušić, "Two-dimensional and π plasmon spectra in pristine and doped graphene", Physical review B: Condensed matter and materials physics, vol. 87, no. 7, 2013. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:035890. [Accessed: 23 December 2024]

Metadata
Title (english)Two-dimensional and π plasmon spectra in pristine and doped graphene
AuthorVito Despoja
AuthorDino Novko
AuthorKrešimir Dekanić
AuthorMarijan Šunjić
AuthorLeonardo Marušić
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
The spectra of electronic excitations in graphene are calculated using first principles time-dependent density functional theory formalism, and used to obtain π and π+σ plasmon dispersion curves. The spectra and dispersion are in excellent agreement with recent experimental results, and they are used to investigate the anisotropy and splitting of a π plasmon, which has also been experimentally verified. The high accuracy of this calculation enabled the discovery of some different features in the spectra, especially the ΓM-ΓK anisotropy of the two-dimensional (2D) plasmon dispersion curve, which qualitatively agrees with recent experimental results. Our ab initio 2D plasmon dispersion curves are compared with the ones obtained in some recently proposed 2D models. They show strong disagreement with the dispersion curve obtained using a simple one-band 2D theory, as well as some discrepancies with respect to the commonly used Das Sarma et al.'s dispersion curve, even in the isotropic region. Excellent agreement of the calculated spectrum in pristine graphene with the electron energy loss spectroscopy spectrum measured for lower momentum transfers is demonstrated.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titlePhysical review B: Condensed matter and materials physics
Numberingvol. 87, no. 7, 075447
p-ISSN1098-0121
e-ISSN1550-235X
DOIhttps://doi.org/10.1103/PhysRevB.87.075447
URN:NBNurn:nbn:hr:217:035890
Publication2013
Document URLhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.075447
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public noteCopyright (2013) by the American Physical Society. Received 7 September 2012; revised manuscript received 4 December 2012; published 27 February 2013.
Created on2019-11-24 12:49:55