Basics of the GaAs(001)-4 × 6 surface. (a) A LEED pattern using an electron energy of 51 eV, (b) atomic structure proposed by Ohtake et al. (adapted from . copyright 2004 American Physical Society), and (c) As 3d and Ga 3d core-level photoemission spectra with various emission angles (θe).
Pi et al. Nanoscale Research Letters 2013 8:169 doi:10.1186/1556-276X-8-169