The dynamics of orbital-ordering domain wall in orbital ordered systems

轨道有序系统中轨道有序畴壁的动力学

• 批准号: 23840010
• 负责人: FUJIOKA Jun
• 金额: $ 1.5万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23840010/
• 关键词: 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

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.

我们研究了相关电子系统轨道阶的畴壁动力学。具体来说，我们研究了具有K2NiF4结构的层状锰氧化物和钙钛矿型钒酸盐的宽带介电光谱，并确定了与畴壁运动相关的新激发。对于钙钛矿钒酸盐，尽管晶体结构接近各向同性，但介质色散呈各向异性，表明DW动力学反映了与磁有序耦合的轨道交换相互作用的一维性质。

项目成果

Ferroelectricity and pressure-induced phenomena driven by neutral ionic valence instability of acid-base supramolecules.

• DOI: 10.1021/ja208113p
• 发表时间: 2012-01
• 期刊: Journal of the American Chemical Society
• 影响因子: 15
• 作者: R. Kumai;S. Horiuchi;J. Fujioka;Y. Tokura

Photocarrier collection from depletion layer of LaMnO_3

LaMnO_3耗尽层光载流子收集

• DOI: 10.1063/1.3677790
• 发表时间: 2012
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: J.Fujioka;M.Nakamura;M.Kawasaki;Y.Tokura
• 通讯作者: Y.Tokura

Photocarrier collection from depletion layer of LaMnO

LaMnO 耗尽层的光载流子收集

• 发表时间: 2012
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: J. Fujioka;M. Nakamura;M. Kawasaki,and Y. Tokura
• 通讯作者: M. Kawasaki,and Y. Tokura

Variation of charge dynamics upon the helimagnetic and metal-insulator transitions for perovskite AFeO3 (A = Sr and Ca)

钙钛矿 AFeO3（A = Sr 和 Ca）的螺旋磁和金属-绝缘体转变时电荷动力学的变化

• 发表时间: 2012
• 期刊: PHYSICAL REVIEW B
• 影响因子: 3.7
• 作者: J. Fujioka;S Ishiwata;Y. Kaneko;Y.Taguchi and Y. Tokura
• 通讯作者: Y.Taguchi and Y. Tokura

LaMnO_3_/Nb:SrTiO_3_ヘテロ接合における光電流の外部電場制御

LaMnO_3_/Nb:SrTiO_3_异质结光电流的外电场控制

• 发表时间: 2012
• 作者: 小林美加;田中肇;藤岡淳
• 通讯作者: 藤岡淳