2016 Fiscal Year Final Research Report
Multipole-driven phenomena of strongly correlated electronic states in non-Kramers systems
| Project/Area Number |
26707017
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Partial Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 多極子秩序 / 超伝導 / 非フェルミ液体 / 四極子近藤効果 / 構造相転移 |
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| Outline of Final Research Achievements |
In the present work, I have focussed on the multipole-driven phenomena in non-Kramers systems PrT2Zn20 (T=Ir, Rh) including the trivalent Pr ion with 4f2 configuration. By means of neutron diffraction experiments in magnetic fields, the order parameter of the quadrupole order in PrIr2Zn20 was determined. La substitution effect on the transition temperatures for the quadrupole order and the superconductivity in PrIr2Zn20 is hardly related. The non-Fermi liquid behaviors of the electrical resistivity and the specific heat can be reproduced by the 2ch Anderson lattice model, suggesting formation of quadrupole Kondo lattice. In magnetic fields at around 5 T applied along the [100] direction, a new type of a Fermi-liquid ground state manifests itself. Moreover, systematic understanding of the quadrupole order, superconductivity, and structural transition in PrT2Zn20 (T=Ir, Rh) and PrT2Al20 (T=Ti, V) were presented.
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| Free Research Field |
磁性物理学
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