ARPES on Nearly Ideal Graphene


© Scienta Omicron

Top) ARPES spectrum of intersecting Dirac cones of graphene grown on SiC(000-1). Bottom) Momentum dispersion curve from top image, as indicated by the red dashed line.

Author: Amina Taleb-Ibrahimi Institute: '' Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, Gif sur Yvette, France'' Physical Review Letters
Date: 2018
Instruments: R4000

In the chase of new materials suitable for nano-electronics etc. great interest is paid to graphene. Ideal graphene is a pure two dimensional sheet of carbon that has a two-dimensional isotropic liner dispersion of the π and π* bands near the Dirac point such that it defines a cone with an apex at the Dirac point of energy. M. Sprinkle et al. used angular resolved photoelectron spectroscopy (ARPES) in there study presented in PRL 103 (2009) 226803 for a first direct observation of a nearly ideal graphene band structure. The observations was made on graphene grown on the SiC(000-1) surface using Scienta R4000 and SES 100 analysers located at the Cassiopée beam line at SOLEIL and at the 12.0.1 beam line at the Advanced Light Source (ALS).