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Title: Unconventional plasmon-phonon coupling in graphene

Abstract

We predict the existence of coupled plasmon-phonon excitations in graphene by using the self-consistent linear response formalism. The unique electron-phonon interaction in graphene leads to unconventional mixing of plasmon and optical phonon polarizations. Here, we find that longitudinal plasmons couple exclusively to transverse optical phonons, whereas graphene’s transverse plasmons couple only to longitudinal optical phonons. This coupling can serve as a magnifier for exploring the electron-phonon interaction in graphene, and it offers electronical control over phonon frequencies.

Authors:
 [1];  [2];  [1]
  1. Univ. of Zagreb, Zagreb (Croatia)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC), Washington, D.C. (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1386849
Grant/Contract Number:  
SC0001299; FG02-09ER46577
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 83; Journal Issue: 16; Related Information: S3TEC partners with Massachusetts Institute of Technology (lead); Boston College; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; solar (photovoltaic); solar (thermal); solid state lighting; phonons; thermal conductivity; thermoelectric; defects; mechanical behavior; charge transport; spin dynamics; materials and chemistry by design; optics; synthesis (novel materials); synthesis (self-assembly); synthesis (scalable processing)

Citation Formats

Jablan, Marinko, Soljačić, Marin, and Buljan, Hrvoje. Unconventional plasmon-phonon coupling in graphene. United States: N. p., 2011. Web. doi:10.1103/PhysRevB.83.161409.
Jablan, Marinko, Soljačić, Marin, & Buljan, Hrvoje. Unconventional plasmon-phonon coupling in graphene. United States. doi:10.1103/PhysRevB.83.161409.
Jablan, Marinko, Soljačić, Marin, and Buljan, Hrvoje. Wed . "Unconventional plasmon-phonon coupling in graphene". United States. doi:10.1103/PhysRevB.83.161409. https://www.osti.gov/servlets/purl/1386849.
@article{osti_1386849,
title = {Unconventional plasmon-phonon coupling in graphene},
author = {Jablan, Marinko and Soljačić, Marin and Buljan, Hrvoje},
abstractNote = {We predict the existence of coupled plasmon-phonon excitations in graphene by using the self-consistent linear response formalism. The unique electron-phonon interaction in graphene leads to unconventional mixing of plasmon and optical phonon polarizations. Here, we find that longitudinal plasmons couple exclusively to transverse optical phonons, whereas graphene’s transverse plasmons couple only to longitudinal optical phonons. This coupling can serve as a magnifier for exploring the electron-phonon interaction in graphene, and it offers electronical control over phonon frequencies.},
doi = {10.1103/PhysRevB.83.161409},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 16,
volume = 83,
place = {United States},
year = {2011},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 35 works
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Figures / Tables:

FIG. 1 FIG. 1: (Color online) (a) Schematic illustration of the lattice structure with two sublattices (A and B). (b) The two degenerate Dirac cones are centered at K and K ′ points at the edge of the Brillouin zone. (c) A displacement of lattice atoms u(r) is parallel (perpendicular) to themore » propagation wave vector q of a LO (TO) phonon. (d) The displacement u(r) creates an effective vector potential Aeff perpendicular to u(r) (the sign of Aeff for the K ′ point is opposite to that for the K point).« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.