In this Communication, the minimum thickness of the jellium slab (to allow for high doping) was set at d=4 Å, which is incorrect. In fact, d=3 Å is the correct thickness limit: it is computationally convergent, is reasonably larger than the covalent diameter of boron (1.74 Å), and the calculations with d=3 Å still avoid spurious occupancy of the vacuum states even at doping as high as q=0.5–1 e/atom. Importantly, for q ≥0.5 e/atom, the v1/3 honeycomb sheet emerges as the ground state (Figure 1). Furthermore, at q=1 e/atom the honeycomb borophene becomes isoelectronic to graphene and Dirac cones appear at the Fermi level (Figure 1 c, inset). This honeycomb structure is the same as that of the boron lattice responsible for superconductivity in MgB2. a) Top: Total energy per atom of all symmetry-inequivalent B sheets calculated by CE fits at a doping level of q=0.03 e/atom as a function of v in the B1−v[…]v systems. Diamonds show the data expanded from a rhombus cell while squares show those expanded from a rectangular cell, as shown in the inset. Hexagonal lattice sites, filled B sites, and hollow hexagons are indicated. The solid line shows the ground states from precise DFT calculations. Bottom: Top three stable sheets, with the stability decreasing as the circle fades from dark to light gray. b) and c) are the same as (a) but for q=0.2 e/atom, and q=0.5–1.0 e/atom, respectively. Bottom panel of (c) shows the the ground state structures for all q=0.5–1.0 e/atom, and inset shows the band structure of the ground state v=1/3 for a doping of q=1.0 e/atom (black solid line) and q=0 e/atom (red dashed lines). Note that the Dirac cone shifts to the Fermi level in this doped configuration.