Giant spin thermoelectric efficiency in ferromagnetic graphene nanoribbons with antidots

Michał Wierzbicki , Renata Świrkowicz , J. Barnaś

Abstract

Thermoelectric effects in zigzag graphene nanoribbons with parallel alignment of the edge spin polarizations are investigated theoretically. Spin and charge thermopower, electrical and heat conductance, and charge and spin thermoelectric efficiency are calculated numerically for pristine nanoribbons as well as for nanoribbons with periodic one-dimensional lattice of structural defects in the form of antidots. It is shown that structural defects reduce thermal conductance due to phonons and open gaps in the corresponding electronic spectrum. This, in turn, leads to a significant enhancement of the Seebeck and spin Seebeck coefficients as well as of the thermoelectric efficiency. A giant enhancement appears in certain regions of chemical potential (controlled by doping or external gate) and survives at room temperatures. © 2013 American Physical Society.
Author Michał Wierzbicki (FP / SRD)
Michał Wierzbicki,,
- Structural Research Division
, Renata Świrkowicz (FP / SRD)
Renata Świrkowicz,,
- Structural Research Division
, J. Barnaś
J. Barnaś,,
-
Journal seriesPhysical Review B, ISSN 1098-0121
Issue year2013
Vol88
No23
Pages235434
ASJC Classification3104 Condensed Matter Physics; 2504 Electronic, Optical and Magnetic Materials
DOIDOI:10.1103/PhysRevB.88.235434
URL http://www.scopus.com/inward/record.url?eid=2-s2.0-84892407203&partnerID=40&md5=9ceb5e3567fb48cef4d52f37f81d8b7e
LanguageEnglish
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 35.0, 01-01-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 01-01-2020, ArticleFromJournal
Publication indicators WoS Citations = 38; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.326; WoS Impact Factor: 2013 = 3.664 (2) - 2013=3.564 (5)
Citation count*5 (2015-02-04)
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