Emergent scale invariance of nonclassical plasmons in graphene nanoribbons

Kåre Obel Wedel, N. Asger Mortensen, Kristian S. Thygesen, Martijn Wubs

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

47 Downloads (Pure)

Resumé

Using a nearest-neighbor tight-binding model we investigate quantum effects of plasmons on few-nanometer wide graphene nanoribbons, both for zigzag and armchair edge terminations. With insight from the Dirac description we find an emerging scale-invariant behavior that deviates from the classical model both for zigzag and armchair structures. The onset of the deviation can be related to the position of the lowest parabolic band in the band structure. Dirac theory is only valid in the parameter subspace where the scale invariance holds that relates narrow ribbons with high doping to wide ribbons with low doping. We also find that the edge states present in zigzag ribbons give rise to a blue shift of the plasmon, in contrast to earlier findings for graphene nanodisks and nanotriangles.

OriginalsprogEngelsk
Artikelnummer155412
TidsskriftPhysical Review B Condensed Matter
Vol/bind98
Udgave nummer15
ISSN1098-0121
DOI
StatusUdgivet - okt. 2018

Fingeraftryk

Nanoribbons
Carbon Nanotubes
Plasmons
Graphite
Invariance
plasmons
Graphene
ribbons
invariance
graphene
Doping (additives)
Band structure
blue shift
emerging
deviation

Citer dette

Wedel, Kåre Obel ; Mortensen, N. Asger ; Thygesen, Kristian S. ; Wubs, Martijn. / Emergent scale invariance of nonclassical plasmons in graphene nanoribbons. I: Physical Review B Condensed Matter. 2018 ; Bind 98, Nr. 15.
@article{c41e8eb0f22f4ced896f7bd14f70dd0c,
title = "Emergent scale invariance of nonclassical plasmons in graphene nanoribbons",
abstract = "Using a nearest-neighbor tight-binding model we investigate quantum effects of plasmons on few-nanometer wide graphene nanoribbons, both for zigzag and armchair edge terminations. With insight from the Dirac description we find an emerging scale-invariant behavior that deviates from the classical model both for zigzag and armchair structures. The onset of the deviation can be related to the position of the lowest parabolic band in the band structure. Dirac theory is only valid in the parameter subspace where the scale invariance holds that relates narrow ribbons with high doping to wide ribbons with low doping. We also find that the edge states present in zigzag ribbons give rise to a blue shift of the plasmon, in contrast to earlier findings for graphene nanodisks and nanotriangles.",
author = "Wedel, {K{\aa}re Obel} and Mortensen, {N. Asger} and Thygesen, {Kristian S.} and Martijn Wubs",
year = "2018",
month = "10",
doi = "10.1103/PhysRevB.98.155412",
language = "English",
volume = "98",
journal = "Physical Review B",
issn = "1098-0121",
publisher = "American Physical Society",
number = "15",

}

Emergent scale invariance of nonclassical plasmons in graphene nanoribbons. / Wedel, Kåre Obel; Mortensen, N. Asger; Thygesen, Kristian S.; Wubs, Martijn.

I: Physical Review B Condensed Matter, Bind 98, Nr. 15, 155412, 10.2018.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Emergent scale invariance of nonclassical plasmons in graphene nanoribbons

AU - Wedel, Kåre Obel

AU - Mortensen, N. Asger

AU - Thygesen, Kristian S.

AU - Wubs, Martijn

PY - 2018/10

Y1 - 2018/10

N2 - Using a nearest-neighbor tight-binding model we investigate quantum effects of plasmons on few-nanometer wide graphene nanoribbons, both for zigzag and armchair edge terminations. With insight from the Dirac description we find an emerging scale-invariant behavior that deviates from the classical model both for zigzag and armchair structures. The onset of the deviation can be related to the position of the lowest parabolic band in the band structure. Dirac theory is only valid in the parameter subspace where the scale invariance holds that relates narrow ribbons with high doping to wide ribbons with low doping. We also find that the edge states present in zigzag ribbons give rise to a blue shift of the plasmon, in contrast to earlier findings for graphene nanodisks and nanotriangles.

AB - Using a nearest-neighbor tight-binding model we investigate quantum effects of plasmons on few-nanometer wide graphene nanoribbons, both for zigzag and armchair edge terminations. With insight from the Dirac description we find an emerging scale-invariant behavior that deviates from the classical model both for zigzag and armchair structures. The onset of the deviation can be related to the position of the lowest parabolic band in the band structure. Dirac theory is only valid in the parameter subspace where the scale invariance holds that relates narrow ribbons with high doping to wide ribbons with low doping. We also find that the edge states present in zigzag ribbons give rise to a blue shift of the plasmon, in contrast to earlier findings for graphene nanodisks and nanotriangles.

U2 - 10.1103/PhysRevB.98.155412

DO - 10.1103/PhysRevB.98.155412

M3 - Journal article

VL - 98

JO - Physical Review B

JF - Physical Review B

SN - 1098-0121

IS - 15

M1 - 155412

ER -