Visualization of Electronic Multiple Ordering and Its Dynamics in High Magnetic Field: Evidence of Electronic Multiple Ordering Crystals
Visualization of Electronic Multiple Ordering and Its Dynamics in High Magnetic Field: Evidence of Electronic Multiple Ordering Crystals
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电子多重有序化及其在高磁场中的动力学可视化：电子多重有序晶体的证据
DOI：
10.1021/acsami.8b04057
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发表时间：
2018
影响因子：
9.5
通讯作者：
Lu Qingyou
中科院分区：
文献类型：
--
作者：
Sheng Zhigao;Feng Qiyuan;Zhou Haibiao;Dong Shuai;Xu Xueli;Cheng Long;Liu Caixing;Hou Yubin;Men Wenjie;Sun Yuping;Nakamura Masao;Tokura Yoshinori;Kawasaki Masashi;Lu Qingyou
构成物质的原子和电子共同决定物质的性质，它们可以分别形成长程有序。区分和隔离晶格晶体中的电子有序是当代材料科学中的一个关键问题。然而，远程电子订货的内在结构很容易受到许多外部因素的影响，因此很难观察到。本文在微米尺度上对锰酸盐薄膜中的电子多重有序（EMO）及其动力学进行了观察。EMO中多个电子自由度之间的强内部耦合使其形态对外部因素具有鲁棒性，并且沿着特定轴和解理面通过明确的边界可见，其行为就像一个多重有序的电子晶体。在7 K时，需要17.6 T的强磁场才能完全熔化这种EMO，并利用自制的高场磁力显微镜对其形成、运动和湮灭动力学进行了成像。EMO寄生在晶格晶体内部，但它的动力学遵循自己的电子相关规则，因此变得可区分和隔离为电子有序。我们的工作为电子订货的理解和控制以及相应器件的设计提供了微观基础。
Constituent atoms and electrons determine matter properties together, and they can form long-range ordering respectively. Distinguishing and isolating the electronic ordering out from the lattice crystal is a crucial issue in contemporary materials science. However, the intrinsic structure of a long-range electronic ordering is difficult to observe because it can be easily affected by many external factors. Here, we present the observation of electronic multiple ordering (EMO) and its dynamics at the micrometer scale in a manganite thin film. The strong internal couplings among multiple electronic degrees of freedom in the EMO make its morphology robust against external factors and visible via well-defined boundaries along specific axes and cleavage planes, which behave like a multiple-ordered electronic crystal. A strong magnetic field up to 17.6 T is needed to completely melt such EMO at 7 K, and the corresponding formation, motion, and annihilation dynamics are imaged utilizing a home-built high-field magnetic force microscope. The EMO is parasitic within the lattice crystal house, but its dynamics follows its own rules of electronic correlation, therefore becoming distinguishable and isolatable as the electronic ordering. Our work provides a microscopic foundation for the understanding and control of the electronic ordering and the designs of the corresponding devices.