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Lattice Specific Heat of Graphene Nanoribbons

  • A. S. Nissimagoudar
  • N. S. Sankeshwar
Conference paper
Part of the Environmental Science and Engineering book series (ESE)

Abstract

The lattice specific heat, C L , of graphene nanoribbons (GNRs) is studied, based on the elastic continuum model. An expression for C L is obtained taking into account the modification of acoustic phonon dispersion due to spatial confinement. Considering the contributions from longitudinal, transverse, torsional and flexural acoustic phonon modes, numerical calculations of C L , as a function of temperature, are presented for T < 3,000 K. With increase in temperature, C L is found to increase up to T < 1,200 K and then tend to saturate to classical limit of 2,078 J/kgK at higher temperatures, the major contribution being from flexural modes. At low temperatures C L is found to decrease with increase in GNR width.

Keywords

Graphene nanoribbon Phonon confinement Lattice specific heat 

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Notes

Acknowledgments

This work was supported by UGC (India). One of the authors (ASN) acknowledges the award of UGC-RFSMS.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Department of PhysicsKarnatak UniversityDharwadIndia

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