Toward high-performance two-dimensional black phosphorus electronic and optoelectronic devices Project supported by the National Natural Science Foundation of China (Grant Nos. 11404118, 61574066, and 61390504). |
(color online) (a) The ball-stick model of few-layer BP. The x, y direction is in-plane vibration along the armchair and zigzag direction, respectively. (b) Band gap of different layer numbers of few-layer BP calculated by different methods. The dashed lines are power-law fitting curves.[ |