2011 Fiscal Year Final Research Report
Theoretical study on metal-insulator transition and superconductivity brought from ordering and fluctuation of multipolar moments
| Project/Area Number |
21540368
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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 | Niigata University (2010-2011)
Kanagawa University (2009) |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | 強相関電子系 / f電子 / 多極子 / 磁性 / 結晶場 / 磁場 / 金属絶縁体転移 / 超伝導 |
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| Research Abstract |
In this project, we have done theoretical studies on unconventional ordering and fluctuation of local multipoles and conduction-electron states in rare-earth compounds. It was shown particularly that the nature of the charge order and the transport properties of conduction electrons in P_rR-u_4P_<12> are explained unifiedly by the pf hybridization model. Then, it was also unveiled that rich variety of ordering phenomena in other skutterudites such as the quadrupolar effect in the superconductor P_rO_s_4Sb_<12> and a complex magnetism in P_rF_e_4A_s_<12> are derived from an interplay of the pf and df hybridizations.
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