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Estimation of the Thermal Expansion Coefficient of Graphene in the Temperature Range of 100–700°K

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Journal of Contemporary Physics (Armenian Academy of Sciences) Aims and scope

Abstract

In this paper, by an analogy with the 3D-systems, and because of the analysis of the dimensionalities of the variables involved, an expression is derived in the quasi-harmonic approximation that allows one to estimate the linear thermal expansion coefficient for a single-layered graphene (which represents the 2D-system) at the temperatures close to the room temperature. It is shown that compared to the other methods to evaluate the thermal expansion coefficient of graphene at the room temperatures (the molecular dynamics method or the method of approximation with the aid of nonequilibrium Green’s function, for which the obtained results differ from experimentally measured values at least by 7%), the accuracy of the value obtained by the suggested expression is 5 times higher (the discrepancy from the measured values figures up to 1.4%).

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Authors and Affiliations

  1. Armenian State Abovyan Pedagogical University, Yerevan, Armenia

    A. V. Yeganyan & E. P. Kokanyan

  2. Institute for Physical Research, NAS of Armenia, Ashtarak, Armenia

    A. V. Yeganyan & E. P. Kokanyan

  3. Lorraine University, Metz, France

    N. E. Kokanyan, M. Aillerie & T. Aubert

  4. CentraleSupélec, Paris-Saclay University, Saint-Aubin, France

    N. E. Kokanyan, M. Aillerie & T. Aubert

Authors
  1. A. V. Yeganyan
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  2. E. P. Kokanyan
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  3. N. E. Kokanyan
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  4. M. Aillerie
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  5. T. Aubert
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Corresponding author

Correspondence to A. V. Yeganyan.

Additional information

Russian Text © The Author(s), 2019, published in Izvestiya Natsional'noi Akademii Nauk Armenii, Fizika, 2019, Vol. 54, No. 3, pp. 405–412.

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Yeganyan, A.V., Kokanyan, E.P., Kokanyan, N.E. et al. Estimation of the Thermal Expansion Coefficient of Graphene in the Temperature Range of 100–700°K. J. Contemp. Phys. 54, 302–307 (2019). https://doi.org/10.3103/S1068337219030113

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  • DOI: https://doi.org/10.3103/S1068337219030113

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