| Project/Area Number |
21740240
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kyushu Institute of Technology (2011)
Osaka University (2009-2010) |
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Principal Investigator |
WATANABE Shinji 九州工業大学, 大学院・工学研究院, 准教授 (40334346)
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| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 強相関系 / 量子臨界現象 / 強相関電子系 / 価数転移 / 量子臨界終点 / 重い電子系 / 1次相転移 / 非フェルミ液体 / 量子臨界価数ゆらぎ / Ce化合物 / Yb化合物 / 価数揺動 / メタ磁性 |
|---|
| Research Abstract |
It is shown theoretically that in strongly correlated electron systems, near the quantum critical end point where the critical end point of the first-order transition is suppressed to absolute zero, new quantum critical phenomena emerge. Near the quantum critical end point of the first-order valence transition, as temperature is decreased, uniform magnetic susceptibility and nuclear magnetic relaxation rate show divergence, resistivity shows a T-linear dependence, and electronic specific-heat coefficient shows logarithmic divergence. These results naturally explain unconventional quantum critical phenomena observed recently in paramagnetic-metal phases in Ce-and Yb-based heavy electron systems.
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