Vibrational properties of nanographene
Sandeep Kumar Singh ; F.M. Peeters
Nanoscale Systems: Mathematical Modeling, Theory and Applications, Tome 2 (2013), p. 10-29 / Harvested from The Polish Digital Mathematics Library

The eigenmodes and the vibrational density of states of the ground state configuration of graphene clusters are calculated using atomistic simulations. The modified Brenner potential is used to describe the carbon-carbon interaction and carbon-hydrogen interaction in case of H-passivated edges. For a given configuration of the C-atoms the eigenvectors and eigenfrequencies of the normal modes are obtained after diagonalisation of the dynamical matrix whose elements are the second derivative of the potential energy. The compressional and shear properties are obtained from the divergence and rotation of the velocity field. For symmetric and defective clusters with pentagon arrangement on the edge, the highest frequency modes are shear modes. The specific heat of the clusters is also calculated within the harmonic approximation and the convergence to the result for bulk graphene is investigated.

Publié le : 2013-01-01
EUDML-ID : urn:eudml:doc:266621
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     author = {Sandeep Kumar Singh and F.M. Peeters},
     title = {Vibrational properties of nanographene},
     journal = {Nanoscale Systems: Mathematical Modeling, Theory and Applications},
     volume = {2},
     year = {2013},
     pages = {10-29},
     zbl = {1273.74132},
     language = {en},
     url = {http://dml.mathdoc.fr/item/bwmeta1.element.doi-10_2478_nsmmt-2013-0002}
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Sandeep Kumar Singh; F.M. Peeters. Vibrational properties of nanographene. Nanoscale Systems: Mathematical Modeling, Theory and Applications, Tome 2 (2013) pp. 10-29. http://gdmltest.u-ga.fr/item/bwmeta1.element.doi-10_2478_nsmmt-2013-0002/

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