| Budget Amount *help |
¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2013: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
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| Outline of Final Research Achievements |
We have developed high-resolution spin-resolved photoemission spectrometer to clarify the relationship between basic electronic states and origin of anomalous physical properties in Dirac electron systems, and have performed high-resolution angle-resolved photoemission spectroscopy (ARPES) studies on graphene-based materials, iron-based superconductors, and topological insulators/semimetals. We have succeeded in (i) controlling the band gap of graphene by surface adsorption, (ii) observing Dirac-cone band in the nematic phase of parent iron-based superconductors, (iii) controlling Dirac-fermion mass at the interface between ultrathin ferromagnet and Rashba metal, and (iv) discovering new types of topological semimetals. From these results, we have clarified close relationship among Dirac-cone electronic states, crystal symmetry, and origin of unconventional physical properties.
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