Diameter dependence of TO phonon frequencies and the Kohn anomaly in armchair single-wall carbon nanotubes

Hagen Telg,1,* Erik H. Hároz,1,2 Juan G. Duque,3 Xiaomin Tu,4 Constantine Y. Khripin,4 Jeffrey A. Fagan,4 Ming Zheng,4 Junichiro Kono,2 and Stephen K. Doorn1,† 1Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 2Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA 3Chemistry Division, Physical Chemistry and Applied Spectroscopy (C-PCS), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 4Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA (Received 16 October 2014; revised manuscript received 24 November 2014; published 15 December 2014)