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Lattice Specific Heat of Graphene Nanoribbons

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Physics of Semiconductor Devices

Part of the book series: Environmental Science and Engineering ((ENVENG))

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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.

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Acknowledgments

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

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Authors and Affiliations

  1. Department of Physics, Karnatak University, Dharwad, 580 003, Karnataka, India

    A. S. Nissimagoudar & N. S. Sankeshwar

Authors
  1. A. S. Nissimagoudar
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  2. N. S. Sankeshwar
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Corresponding author

Correspondence to N. S. Sankeshwar .

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Editors and Affiliations

  1. Amity Institute for Advanced Research and Studies (Meterials & Devices), Amity University, Noida, Uttar Pradesh, India

    V. K. Jain

  2. Amity Institute for Advanced Research and Studies (Meterials & Devices), Amity University, Noida, Uttar Pradesh, India

    Abhishek Verma

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© 2014 Springer International Publishing Switzerland

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Nissimagoudar, A.S., Sankeshwar, N.S. (2014). Lattice Specific Heat of Graphene Nanoribbons. In: Jain, V., Verma, A. (eds) Physics of Semiconductor Devices. Environmental Science and Engineering(). Springer, Cham. https://doi.org/10.1007/978-3-319-03002-9_135

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