| Budget Amount *help |
¥47,320,000 (Direct Cost: ¥36,400,000、Indirect Cost: ¥10,920,000)
Fiscal Year 2014: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Fiscal Year 2013: ¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2012: ¥20,280,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥4,680,000)
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| Outline of Final Research Achievements |
We investigated geometric and electronic structures of tw-dimensional superstructures consisting of Si atoms on Ag(111) by using scanning tunneling microscopy, lo-energy electron diffraction, density functional theory calculations and etc. We observed several superstructures after depositing Si atoms on the Ag(111) substrate. We investigated in detail 4x4 superstructure which appears as a single phase. Geometric analysis by electron diffraction and theoretical calculations has shown that the 4x4 structure is a honeycomb lattice of Si atoms (it can be called as Silicene). We also found that the electronic structure is strongly modified comparing with that of freestanding silicene which shows Dirac fermion features because of the strong hybridization with the substrate electronic system. We theoretically demonstrated that metal substrate covered with a monolayer h-BN sheet provides a good stage to realize Dirac fermion silicene.
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