ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Phonons in few-layer graphene and interplanar interaction: A first-principles study

Saha, Srijan Kumar and Waghmare, UV and Krishnamurthy, HR and Sood, AK (2008) Phonons in few-layer graphene and interplanar interaction: A first-principles study. In: Physical Review B: Condensed Matter and Materials Physics, 78 (16). pp. 165421-165426.

[img] PDF
full.pdf - Published Version
Restricted to Registered users only

Download (304kB) | Request a copy
Official URL: http://scitation.aip.org/getabs/servlet/GetabsServ...


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 (˜112cm‑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.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Mr. Ramesh Chander
Date Deposited: 07 Sep 2009 08:59
Last Modified: 19 Sep 2010 04:57
URI: http://eprints.iisc.ac.in/id/eprint/17525

Actions (login required)

View Item View Item