The electronic structure of monolayer hexagonal boron nitride grown on Ni by the diffusion and precipitation method was studied by x-ray absorption spectroscopy, emission spectroscopy, x-ray photoelectron spectroscopy and micro-ultraviolet photoemission spectroscopy. No indication of hybridization between h-BN pi and Ni 3d orbitals was observed. That is, the monolayer h-BN was found to be in the quasi-free-standing state. These results are in striking contrast to those of previous studies in which h-BN was strongly bound to the Ni surface by the orbital hybridization. The absence of hybridization is attributed to absence of a Ni(111) surface in this study. The lattice-matched Ni(111) surface is considered to be essential to orbital hybridization between h-BN and Ni.
@article{arxiv.1810.08341,
title = {Quasi-free-standing monolayer hexagonal boron nitride on Ni},
author = {Satoru Suzuki and Yuichi Haruyama and Masahito Niibe and Takashi Tokushima and Akinobu Yamaguchi and Yuichi Utsumi and Atsushi Ito and Ryo Kadowaki and Akane Maruta and Tadashi Abukawa},
journal= {arXiv preprint arXiv:1810.08341},
year = {2018}
}