Atomic modeling of structural and optical properties of amorphous silicon

作者：Vazhappilly Tijo; Micha David A^*

来源：Chemical Physics Letters, 2013, 570: 95-99.

DOI：10.1016/j.cplett.2013.03.053

We have developed a computationally efficient procedure for modeling of amorphous structures (a-Si), starting with a molecular dynamics simulation of crystalline silicon (c-Si) with a force field, followed by melting and ab initio electronic structure calculations at low temperatures. The radial distribution functions and static structure factors for our a-Si structures and the density of vibrational states are in good agreement with experimental values. New results on photoabsorbance for melted and final a-Si structures are compared with the c-Si structure, and a-Si shows broader but weaker absorption compared to c-Si. Our procedure should be equally applicable to other atomic structures.

• 出版日期2013-5-10