title: Rao et al. reply:
authors.affiliation: Center for Applied Energy Research, Department of Physicsand Astronomy, University of KentuckyLexington, Kentucky 40506, USA.
authors.initials: AM
authors.lastname: Rao
authors.initials: A
authors.lastname: Jorio
authors.initials: MA
authors.lastname: Pimenta
authors.initials: MS
authors.lastname: Dantas
authors.initials: R
authors.lastname: Saito
authors.initials: G
authors.lastname: Dresselhaus
authors.initials: MS
authors.lastname: Dresselhaus