Spectacular enhancement of thermoelectric phenomena in chemically synthesized graphene nanoribbons with substitution atoms

Krzysztof Zberecki , Renata Świrkowicz , Michał Wierzbicki , J. Barnaś

Abstract

We analyze theoretically the transport and thermoelectric properties of graphene nanoribbons of a specific geometry, which have been synthesized recently from polymers [Cai, et al., Nature, 2011, 466, 470]. When such nanoribbons are modified at one of the two edges by Al or N substitutions, they acquire a ferromagnetic moment localized at the modified edge. We present numerical results on the electronic structure and thermoelectric properties (including also spin thermoelectricity) of the modified nanoribbons. The results show that such nanoribbons can display large thermoelectric efficiency in certain regions of chemical potential, where the corresponding electric and spin figures of merit achieve unusually large values. The enhancement of thermoelectric efficiency follows from a reduced phonon heat conductance of the nanoribbons and from their peculiar electronic band structure. Thus, such nanoribbons are promising for practical applications in nanoelectronic and spintronic devices. © 2016 the Owner Societies.
Author Krzysztof Zberecki ZBS
Krzysztof Zberecki,,
- Structural Research Division
, Renata Świrkowicz ZBS
Renata Świrkowicz,,
- Structural Research Division
, Michał Wierzbicki ZBS
Michał Wierzbicki,,
- Structural Research Division
, J. Barnaś
J. Barnaś,,
-
Journal seriesPhysical Chemistry Chemical Physics, ISSN 1463-9076
Issue year2016
Vol18
No27
Pages18246-18254
Publication size in sheets0.5
DOIDOI:10.1039/c6cp02877b
URL http://pubs.rsc.org.doi.eczyt.bg.pw.edu.pl/en/Content/ArticleLanding/2016/CP/C6CP02877B#!divAbstract
Languageen angielski
File
zberecki2016.pdf / 2.79 MB / zberecki2016.pdf 2.79 MB
Score (nominal)40
ScoreMinisterial score = 40.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 4.123 (2) - 2016=4.242 (5)
Citation count*0
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