2010 Fiscal Year Final Research Report
Heavy electron states and superconductivity due to anharmonic phonons
| Project/Area Number |
20540347
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
UEDA Kazuo 東京大学, 物性研究所, 教授 (70114395)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 物性理論 / 強相関電子系 / 低温物性 / 磁性 / 近藤効果 / 非調和フォノン |
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| Research Abstract |
The spectral weight of an anharmonic oscillator coupled with conduction electrons is obtained. The ground-state phase diagram of the one dimensional Holstein model of anharmonic oscillators is determined by quantum Monte Carlo simulations. Kondo effect of magnetic ions vibrating in metals is investigated by using the numerical renormalization group method. We find two-channel Kondo effect at the border of the two different fixed points with different parities.
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