| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
Quantum critical phenomena of the heavy-fermion materials have been studied by the low-temperature thermoelectric coefficient measurements. As a result, distinct nature of quantum criticality between two representative Yb-based quantum critical materials β-YbAlB4 and YbRh 2 Si2 has been revealed by contrasting behaviors of the Seebeck coefficient near their quantum critical points (QCP). Moreover, a satisfactory of the Wiedemann-Franz law has been verified in YbRh 2 Si2 at the QCP. These results place strong constraint on models for the quantum criticality of these materials.
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