Anisotropic ultraviolet-plasmon dispersion in black phosphorus

G. Nicotra, E. Van Veen, I. Deretzis, L. Wang, J. Hu, Z. Mao, V. Fabio, C. Spinella, G. Chiarello, A. Rudenko, S. Yuan, A. Politano

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

By means of momentum-resolved electron energy loss spectroscopy (EELS) coupled with scanning transmission electron microscopy, we have studied the dispersion relation of interband plasmonic modes in the ultraviolet in black phosphorus. We find that the dispersion of the interband plasmons is anisotropic. Experimental results are reproduced by density functional theory, by taking into account both the anisotropy of the single-particle response function, arising from the anisotropic band structure, and the damping. Moreover, our theoretical model also indicates the presence of low-energy excitations in the near-infrared that are selectively active in the armchair direction, whose existence has been experimentally validated by high-resolution EELS (HREELS) in reflection mode. \ 2018 The Royal Society of Chemistry.
Original languageEnglish
Pages (from-to)21918-21927
Number of pages10
JournalNanoscale
Volume10
Issue number46
DOIs
StatePublished - 2018

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Electron energy loss spectroscopy
Phosphorus
Plasmons
Excitation energy
Band structure
Density functional theory
Momentum
Anisotropy
Damping
Transmission electron microscopy
Infrared radiation
Scanning electron microscopy
Direction compound

Cite this

Nicotra, G., Van Veen, E., Deretzis, I., Wang, L., Hu, J., Mao, Z., ... Politano, A. (2018). Anisotropic ultraviolet-plasmon dispersion in black phosphorus. Nanoscale, 10(46), 21918-21927. https://doi.org/10.1039/c8nr05502e
Nicotra, G. ; Van Veen, E. ; Deretzis, I. ; Wang, L. ; Hu, J. ; Mao, Z. ; Fabio, V. ; Spinella, C. ; Chiarello, G. ; Rudenko, A. ; Yuan, S. ; Politano, A. / Anisotropic ultraviolet-plasmon dispersion in black phosphorus. In: Nanoscale. 2018 ; Vol. 10, No. 46. pp. 21918-21927.
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abstract = "By means of momentum-resolved electron energy loss spectroscopy (EELS) coupled with scanning transmission electron microscopy, we have studied the dispersion relation of interband plasmonic modes in the ultraviolet in black phosphorus. We find that the dispersion of the interband plasmons is anisotropic. Experimental results are reproduced by density functional theory, by taking into account both the anisotropy of the single-particle response function, arising from the anisotropic band structure, and the damping. Moreover, our theoretical model also indicates the presence of low-energy excitations in the near-infrared that are selectively active in the armchair direction, whose existence has been experimentally validated by high-resolution EELS (HREELS) in reflection mode. \ 2018 The Royal Society of Chemistry.",
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Nicotra, G, Van Veen, E, Deretzis, I, Wang, L, Hu, J, Mao, Z, Fabio, V, Spinella, C, Chiarello, G, Rudenko, A, Yuan, S & Politano, A 2018, 'Anisotropic ultraviolet-plasmon dispersion in black phosphorus', Nanoscale, vol. 10, no. 46, pp. 21918-21927. https://doi.org/10.1039/c8nr05502e

Anisotropic ultraviolet-plasmon dispersion in black phosphorus. / Nicotra, G.; Van Veen, E.; Deretzis, I.; Wang, L.; Hu, J.; Mao, Z.; Fabio, V.; Spinella, C.; Chiarello, G.; Rudenko, A.; Yuan, S.; Politano, A.

In: Nanoscale, Vol. 10, No. 46, 2018, p. 21918-21927.

Research output: Contribution to journalArticle

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AU - Nicotra, G.

AU - Van Veen, E.

AU - Deretzis, I.

AU - Wang, L.

AU - Hu, J.

AU - Mao, Z.

AU - Fabio, V.

AU - Spinella, C.

AU - Chiarello, G.

AU - Rudenko, A.

AU - Yuan, S.

AU - Politano, A.

N1 - cited By 0

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N2 - By means of momentum-resolved electron energy loss spectroscopy (EELS) coupled with scanning transmission electron microscopy, we have studied the dispersion relation of interband plasmonic modes in the ultraviolet in black phosphorus. We find that the dispersion of the interband plasmons is anisotropic. Experimental results are reproduced by density functional theory, by taking into account both the anisotropy of the single-particle response function, arising from the anisotropic band structure, and the damping. Moreover, our theoretical model also indicates the presence of low-energy excitations in the near-infrared that are selectively active in the armchair direction, whose existence has been experimentally validated by high-resolution EELS (HREELS) in reflection mode. \ 2018 The Royal Society of Chemistry.

AB - By means of momentum-resolved electron energy loss spectroscopy (EELS) coupled with scanning transmission electron microscopy, we have studied the dispersion relation of interband plasmonic modes in the ultraviolet in black phosphorus. We find that the dispersion of the interband plasmons is anisotropic. Experimental results are reproduced by density functional theory, by taking into account both the anisotropy of the single-particle response function, arising from the anisotropic band structure, and the damping. Moreover, our theoretical model also indicates the presence of low-energy excitations in the near-infrared that are selectively active in the armchair direction, whose existence has been experimentally validated by high-resolution EELS (HREELS) in reflection mode. \ 2018 The Royal Society of Chemistry.

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SP - 21918

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JO - Nanoscale

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