We study the electronic transport properties of two-dimensional (2D) fully-hydrogenated borophene (namely, borophane), using the density functional theory and non-equilibrium Green's function approaches. Borophane shows a perfect electrical transport anisotropy and is promising for applications. Along the peak- or equivalently the valley-parallel direction, the 2D borophane exhibits a metallic characteristic and its current-voltage (I-V) curve shows a linear behavior, corresponding to the ON state in borophane-based nano-switch. In this case, electrons mainly propagate via the B-B bonds along the linear boron chains. In contrast, the electron transmission is almost forbidden along the perpendicular buckled direction (i.e., the OFF state), due to its semi-conductor property. Our work demonstrates that 2D borophane could combine the metal and semiconductor features and can be a promising candidate of nano-switching materials with stable structure and high ON/OFF ratio.
@article{arxiv.1810.01532,
title = {How does the electric current propagate through the fully-hydrogenated borophene?},
author = {Yipeng An and Jutao Jiao and Yusheng Hou and Hui Wang and Dapeng Wu and Tianxing Wang and Zhaoming Fu and Guoliang Xu and Ruqian Wu},
journal= {arXiv preprint arXiv:1810.01532},
year = {2018}
}