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Thermoelectricity in graphene: Effects of a gap and magnetic fields

Patel, AavishkarA and Mukerjee, Subroto (2012) Thermoelectricity in graphene: Effects of a gap and magnetic fields. In: PHYSICAL REVIEW B, 86 (7).

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Official URL: http://dx.doi.org/10.1103/PhysRevB.86.075411

Abstract

We calculate the thermopower of monolayer graphene in various circumstances. We consider acoustic phonon scattering which might be the operative scattering mechanism in freestanding films and predict that the thermopower will be linear in any induced gap in the system. Further, the thermopower peaks at the same value of chemical potential (tunable by gate voltage) independent of the gap. We show that in the semiclassical approximation, the thermopower in a magnetic field saturates at high field to a value which can be calculated exactly and is independent of the details of the scattering. This effect might be observable experimentally. We also note that a Yukawa scattering potential can be used to fit experimental data for the thermopower for reasonable values of the screening length parameter.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to American Physical Society
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 10 Sep 2012 12:18
Last Modified: 10 Sep 2012 12:18
URI: http://eprints.iisc.ernet.in/id/eprint/44997

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