Possible presence of a charge-orbital density wave in layered manganites Nd1-xCa1+xMnO4
Possible presence of a charge-orbital density wave in layered manganites Nd1-xCa1+xMnO4
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DOI：
10.1103/physrevb.68.092405
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发表时间：
2003
影响因子：
3.7
通讯作者：
T. Nagai;Tatsumi Kimura;A. Yamazaki;Y. Tomioka;K. Kimoto;Y. Tokura;Y. Matsui
中科院分区：
文献类型：
--
作者：
T. Nagai;Tatsumi Kimura;A. Yamazaki;Y. Tomioka;K. Kimoto;Y. Tokura;Y. Matsui
我们研究了与电荷轨道有序相关的单层锰石${\mathrm{Nd}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{1+x}{\mathrm{MnO}}_{4}$在适当和不适当掺杂水平下的结构修饰$(0.55\ensuremath{\leqq}x\ensuremath{\leqq}0.75).$高分辨率电子显微镜（HREM）显示电荷轨道有序相中的横向和正弦结构调制与掺杂水平相关的周期为${d}_{s}=a/(1\ensuremath{-}x)$。我们讨论了基于HREM观测的单层锰矿的轨道密度波和电荷密度波的可能性。
We have studied the structural modifications related to the charge-orbital ordering for single-layered manganites ${\mathrm{Nd}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{1+x}{\mathrm{MnO}}_{4}$ with both commensurate and incommensurate doping levels $(0.55\ensuremath{\leqq}x\ensuremath{\leqq}0.75).$ High-resolution electron microscopy (HREM) revealed transverse and sinusoidal structural modulations with a doping-level-dependent period of ${d}_{s}=a/(1\ensuremath{-}x)$ in the charge-orbital ordered phases. We discuss the possibility of an orbital-density wave as well as a charge-density wave based on the HREM observation of the single-layered manganites.