2012 Fiscal Year Final Research Report
The dynamics of orbital-ordering domain wall in orbital ordered systems
| Project/Area Number |
23840010
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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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 | The University of Tokyo |
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Principal Investigator |
FUJIOKA Jun 東京大学, 大学院・工学系研究科, 助教 (80609488)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 物性実験 / 強相関電子系 / 強相関エレクトロニクス / 低温物性 / 軌道秩序 |
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| Research Abstract |
We have studied the domain wall (DW) dynamics of orbital order for the correlated electron systems. Specifically, we investigated the broad-band dielectric spectra for the layered Mn-oxides with K2NiF4 structure and perovskite-type vanadates and identified the novel excitation associated with the motion of domain wall. For perovskite vanadates, the anisotropic dielectric dispersion is observed despite of the nearly isotropic crystal structure, indicating that the DW dynamics reflects the 1D-nature of the orbital exchange interaction coupled to the magnetic ordering.
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[Journal Article] Soft phonon mode coupled with antiferromagnetic order in incipient-ferroelectric Mott insulators2012
Author(s)
H. Sakai, J. Fujioka, T. Fukuda, M. S.Bahramy, D. Okuyama, R. Arita, T. Arima,A. Q. R. Baron, Y. Taguchi, and Y. Tokura,
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Journal Title
PHYSICAL REVIEW B
Volume: 86
Pages: 104407- 1
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