Electronic structure of the 3x3 ordered-phase of a silicon (Si) layer on Al(111) has been studied by angle resolved photoemission spectroscopy (ARPES) technique using synchrotron radiation and modeled by a trial atomic model. A closed Fermi surface originating from linearly dispersing band is identified. A band structure calculation of a trial atomic model of the honeycomb silicene on Al(111) implies that the metallic band originates from the Al-Si hybrid state that has the Dirac cone-like dispersion curves. The Si layer on Al(111) can be a model system of Xene to realize the massless electronic system through the overlayer-substrate interaction.
@article{arxiv.2005.05522,
title = {Electronic structure of a 3x3-ordered silicon layer on Al(111)},
author = {Y. Sato and Y. Fukaya and M. Cameau and A. K. Kundu and D. Shiga and R. Yukawa and K. Horiba and C. -H. Chen and A. Huang and H. -T. Jeng and T. Ozaki and H. Kumigashira and M. Niibe and I. Matsuda},
journal= {arXiv preprint arXiv:2005.05522},
year = {2020}
}