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Electronically smectic-like phase in a nearly half-doped manganite

F. Ye·J. A. Fernandez-Baca·Pengcheng Dai·J. W. Lynn·H. Kawano-Furukawa·H. Yoshizawa·Y. Tomioka·Y. Tokura
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Abstract

We use neutron scattering to study the spin and charge/orbital ordering (CO-OO) in the nearly half-doped perovskite manganite $Pr_{0.55}(Ca_{0.8}Sr_{0.2})_{0.45}MnO_3$ (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 smectic-like phase results directly from the spin-orbit interaction and demonstrates the presence of textured `electronic soft' phases in doped Mott insulators.

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F. Ye, J. A. Fernandez-Baca, Pengcheng Dai, J. W. Lynn, H. Kawano-Furukawa, H. Yoshizawa, Y. Tomioka, Y. Tokura. 2005-08-29. Electronically smectic-like phase in a nearly half-doped manganite. https://doi.org/10.1103/physrevb.72.212404

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