| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Research Abstract |
In decreasing the bandgap of the direct semiconductor, the nonparabolicity of the energy band is enhanced, and the Dirac electron system with linear dispersion is realized at zero band gap. Further making the bandgap negative, one could obtain the semimetallc electron-hole systems. We study the effect of correlation in these Dirac and semimetallic electron-hole systems. We particularly clarified the following five issues;
(1) cyclotron resonance on grapheme under strong magnetic field
(2) novel pair condensations in electron-hole bilayers with density unbalance
(3) biexcitons and trions in semiconducting carbon nanotubes
(4) global phase diagrams of low-dimensional electron-hole systems
(5) Designing of Dirac points in energy band.
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