Band structure of silicon and germanium thin films based on first principles Project supported by the National Natural Science Foundation of China (Grant Nos. 11264007 and 61465003). |
(color online) Unit cells, overhead view, and lateral view of Si nanofilms with different orientations: (a) (100), (b) (110), and (c) (111). The Si and H atoms are represented by yellow and gray balls, respectively. |