Direct observation of incommensurate charge-density wave in overdoped manganites
Direct observation of incommensurate charge-density wave in overdoped manganites
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过掺杂锰氧化物中不相称电荷密度波的直接观察
DOI:
10.1016/j.mtphys.2018.05.003
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发表时间:
2018-06
影响因子:
11.5
通讯作者:
Zhifeng Ren
中科院分区:
文献类型:
--
作者:
Yumei Wang;Binghui Ge;Yangxiang Cui;Richeng Yu;Zhifeng Ren
The origin of the charge and orbital ordering is still the subject of debate. In manganites, charge ordering (CO) has been traditionally identified as an ordered arrangement of Mn3+and Mn4+ions. Here, by high-resolution transmission electron microscopy (HRTEM) in combination with image deconvolution technique and the high-dimensional space description, the nature of CO related to the structural modulation is revealed as an incommensurate charge-density wave (CDW) in real-space for overdoped manganites La0.8Ca2.2Mn2O7. This result resolves the current controversy and confirms the incommensurate CO is not simply a mixture of commensurate ones with different periodicities. In this sense, we provide the first HRTEM imaging evidence for a CDW picture.
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