| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Outline of Final Research Achievements |
Surface structures of Ag-In-Yb quasicrystal (QC) and related compounds are studied theoretically based on the first-principles electronic structure calculations. First, (001) surface of 1/1 cubic approximant is studied with a method of simulated cleavage. In this simulation, a sample is elongated uniformly in one direction and then all the atoms are relaxed to force-free positions. After the relaxation, a gap opens between atomic layers and a cleaved surface is obtained. We have found several different cleaved surfaces and discussed their relative stability. Second, structure of Pb overlayer on 5-fold surface of Ag-In-Yb QC is studied. Here, we calculate adsorption energies of Pb atoms on a five-fold disc-shaped cluster extracted from a model of Cd-based QC. We have given theoretically a scenario of atom-by-atom growth and a model of atomic positions for Pb overlayer.
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