Determination of two-dimensional phonon dispersion relation of graphite by Raman spectroscopy

作者:Gruneis A*; Saito R; Kimura T; Cancado LG; Pimenta MA; Jorio A; Souza AG; Dresselhaus G; Dresselhaus MS
来源:Physical Review B, 2002, 65(15): 155405.
DOI:10.1103/PhysRevB.65.155405

摘要

Phonon dispersion relations of a two-dimensional (2D) graphite are obtained by fitting dispersive Raman modes that originate from nonzone center phonons near the Gamma or K point in the Brillouin zone (BZ). A new set of 12 force constants of 2D graphite up to the fourth neighbor are determined by a self-consistent fitting procedure, combined with double-resonance Raman theory. Analytical expressions for eigenvalues and eigenvectors at high symmetry points of the BZ are presented.

  • 出版日期2002-4-15