Electronically smecticlike liquid-crystal phase in a nearly half-doped manganite
Electronically smecticlike liquid-crystal phase in a nearly half-doped manganite
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DOI：
10.1103/physrevb.72.212404
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发表时间：
2005-05
影响因子：
3.7
通讯作者：
Feng Ye;J. Fernandez-Baca;J. Fernandez-Baca;Pengcheng Dai;Pengcheng Dai;J. W. Lynn;H. Kawano-Furukawa;Hideki Yoshizawa;Y. Tomioka;Y. Tokura
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文献类型：
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作者：
Feng Ye;J. Fernandez-Baca;J. Fernandez-Baca;Pengcheng Dai;Pengcheng Dai;J. W. Lynn;H. Kawano-Furukawa;Hideki Yoshizawa;Y. Tomioka;Y. Tokura
我们利用中子散射研究了近半掺杂的钙钛矿亚锰矿 Pr-0.55(Ca0.8Sr0.2)(0.45)MnO3 (PCSMO) 中的自旋和电荷轨道排序 (CO-OO)。从室温冷却时，PCSMO首先进入T-CO以下的CO-OO状态，然后在T-N以下成为CE型长程有序反铁磁体。在高于 T-N 但低于 T-CO (T-N< T < T-CO) 的温度下，PCSMO 中的自旋形成高度各向异性的近晶液晶状织构，具有反铁磁弱耦合的铁磁 (FM) 准长程有序一维锯齿链。这种类磁性近晶相直接由自旋轨道相互作用产生，并证明了掺杂莫特绝缘体中纹理“电子软”相的存在。
We use neutron scattering to study the spin and charge-orbital ordering (CO-OO) in the nearly half-doped perovskite manganite Pr-0.55(Ca0.8Sr0.2)(0.45)MnO3 (PCSMO). On cooling from room temperature, PCSMO first enters into a CO-OO state below T-CO and then becomes a CE-type long-range ordered antiferromagnet below T-N. At temperatures above T-N but below T-CO (T-N< T < T-CO), the spins in PCSMO form highly anisotropic smectic liquid-crystal-like texture with ferromagnetic (FM) quasi-long-range ordered one-dimensional zigzag chains weakly coupled antiferromagnetically. Such a magnetic smecticlike phase results directly from the spin-orbit interaction and demonstrates the presence of textured "electronic soft" phases in doped Mott insulators.