  Motivated by recent experimental and theoretical research on a monolayer of
Boron atoms, Borophene, current-voltage characteristics of three different
Borophene sheets, 2Pmmn, 8Pmmn and 8Pmmm, are calculated using density
functional theory combined with nonequilibriumGreen function formalism.
Borophene sheets with two and eight atoms in a unit cell are considered and
bandstructure, electron density and structural anisotropy of them are analyzed
in details. Results show that 8Pmmn and 8Pmmm structures which have eight atoms
in the unit cell have less anisotropy than 2Pmmn. In addition, although 8Pmmn
shows a Dirac cone in the bandstructure, its current is lower than two others.
We also consider a fully hydrogenated Borophene, Borophane, and find that the
hydrogenation process reduces the structural anisotropy and the current
significantly. Our findings reveal that the current-voltage characteristics of
the Borophene sheets can be used to detect the kind and the growth direction of
the sample because it is strongly dependent on the direction of the electron
transport, anisotropy and details of the unit cell of the Borophene.
