[1] [1] MANFRINETTI P, FORNASINI ML, PALENZOA A. The phase diagram of the Ca-Si system［J］. Intermetallics, 2000, 8(3): 223-238.

[2] [2] LEBGUE S, ARNAUD B, ALOUANI M. Calculated quasiparticle and optical properties of orthorhombic and Ca2Si［J］. Physical Review B, 2005, 72(8): 1-8.

[3] [3] IMAI Y, WATANABE A. Energetics of alkaline-earth metal silicides calculated using a first-principle pseudo potential method［J］. Intermetallics, 2002, 10(4): 333-341.

[4] [4] MATSUI H, KURAMOTO M, ONO T, et al. Growth of Ca2Si layers on Mg2Si/Si(111) substrates［J］ . Crystal Growth, 2002, 237-239: 2121-2124.

[5] [5] CHEMELLI C, SANCROTTI M, BRAICOVICH L, et al. Empty electronic states of calcium silicides: An inverse-photoemission investigation in the ultraviolet photo range［J］. Physical Review B, 1989, 40(15): 10210-10217.

[6] [6] IMAI Y, WATANABE A, MUKAIDA M et al. Electronic structures of semiconducting alkaline-earth metal silicides［J］. Journal of Alloys and Compounds, 2003, 358(1-2): 257-263.

[7] [7] MIGAS D B, MIGLIO L, SHAPOSHNIKOV V L, et al. Comparative Study of structural, electronic and optical properties of Ca2Si, Ca2Ge, Ca2Sn and Ca2Pb［J］. Physical Review B, 2003, 67(20): 205203.

[8] [8] TATSUOKA H, TAKAGI N, OKAYA S, et al. Microstructures of semiconducting silicide layers grown by, novel growth techniques［J］. Thin Solid Films, 2004, 461: 57-62.

[9] [9] TAKAGI N, SATO Y, MATSUYAMA T, et al. Growth and structural properties of Mg2Si and Ca2Si bulk crystals［J］. Applied Surface Science, 2005, 244(1-4): 330-333.

[10] [10] BUSCH C, JUNOD P, KATZ U, et al. Electrical conductivity of the Intermetallic compounds Ca2Si, Ca2Sn, Ca2Pb, ZnSb［J］. Helvetica Physical Acta, 1954, 27: 193.

[11] [11] YANG Y Y, XIE Q. A single phase semiconducting Ca-silicide film growth by sputtering conditions, annealing temperature and annealing time［J］. Journal of Materials Science, 2009, 44(14): 3877-3882.

[12] [12] PALENZONA A, MANFRINETTI P, FORNASINI M L. Phase diagram of the Ca-Sn system［J］. Journal of Alloys and Compounds, 2000, 312(1-2): 165-171.

[13] [13] SEGALL M D, LINDAN P J D, PROBERT M J, et al. First-principles simulation: ideas, illustrations and the CASTEP code［J］. Journal of Physics, 2002, 14(11): 2717-2744.

[14] [14] FENG Yun, XIE Quan, GAO Ran, et al. First-principles calculation of electronic structure and optical properties of K-doped orthorhombic Ca2Si［J］. Transactions of Materials and Heat Treatment, 2012, 33(9): 155-160.