@article{ISI:000260574500110,
 abstract = {We use first-principles density-functional theory calculations to
determine the vibrational properties of ultrathin n(1,2,...,7)-layer
graphene films and present a detailed analysis of their zone-center
phonons. We demonstrate that a low-frequency (similar to 112 cm(-1))
optical phonon with out-of-plane displacements exhibits a particularly
large sensitivity to the number of layers, although no discernible
change in the interlayer spacing is found as n varies. Frequency shifts
of the optical phonons in bilayer graphene are also calculated as a
function of its interlayer separation and interpreted in terms of the
interplanar interaction.},
 article-number = {165421},
 author = {Saha, Srijan Kumar and Waghmare, U. V. and Krishnamurthy, H. R. and
Sood, A. K.},
 doi = {10.1103/PhysRevB.78.165421},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {OCT},
 number = {16},
 orcid-numbers = {Saha, Srijan Kumar/0000-0002-5086-796X},
 researcherid-numbers = {Saha, Srijan Kumar/J-7552-2012},
 times-cited = {54},
 title = {Phonons in few-layer graphene and interplanar interaction: A
first-principles study},
 unique-id = {ISI:000260574500110},
 volume = {78},
 year = {2008}
}