2018
DOI: 10.1140/epjb/e2018-90407-y
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High energy shift in the optical conductivity spectrum of the bilayer graphene

Abstract: We calculate theoretically the optical conductivity in the bilayer graphene by considering Kubo-Green-Matsubara formalism. Different regimes of the interlayer coupling parameter have been considered in the paper. We show that the excitonic effects substantially affect the optical conductivity spectrum at the high-frequency regime when considering the full interaction bandwidth, leading to a total suppression of the usual Drude intraband optical transition channels and by creating a new type of optical gap. We … Show more

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Cited by 2 publications
(3 citation statements)
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“…It is worth to mention that the electrical conductivity function presented here (as a consequence of temperature gradient in the system) differs much from the optical conductivity function discussed in Ref. [40], where a threshold behavior is observed in the conductivity spectrum. We see in Fig.…”
Section: Fig 14 (Color Online)contrasting
confidence: 74%
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“…It is worth to mention that the electrical conductivity function presented here (as a consequence of temperature gradient in the system) differs much from the optical conductivity function discussed in Ref. [40], where a threshold behavior is observed in the conductivity spectrum. We see in Fig.…”
Section: Fig 14 (Color Online)contrasting
confidence: 74%
“…ering the optical conductivity in this system [40,50,51]. The small values of κ(ω) imply the large values for the thermoelectric figure of merit, thus, the relatively small values of the thermal conductivity in the high frequency region, as compared with those in the low frequency regime, could be interesting for the thermoelectrical device applications of the BLG.…”
Section: The Results and Discussionmentioning
confidence: 92%
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