In this work, we foresee the structure of a new class of borophenes with smaller 2D densities of atoms than those explored so far for 2D boron crystals. Boron atoms in the porous borophenes tend to be 5-coordinated in contrast to commonly investigated structures with hexagonal holes for which the number of nearest neighbors of each atom varies from 3 to 6. High metallic character is the usual feature of borophenes, however, we have also identified a semimetallic borophene that turns into semiconductor upon unit cell expansion. A 10% increase in lattice constant of this structure gives rise to an energy gap of 0.3eV. This extends to semiconductor industry the possible application of 2D boron crystals.
@article{arxiv.2109.08739,
title = {The structure of porous 2D boron crystals},
author = {T. Tarkowski and M. Marchwiany and N. Gonzalez Szwacki},
journal= {arXiv preprint arXiv:2109.08739},
year = {2021}
}