Tracing the ionic evolution during ILG induced phase transformation in strontium cobaltite thin films
Tracing the ionic evolution during ILG induced phase transformation in strontium cobaltite thin films
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追踪锶钴矿薄膜中 ILG 诱导相变过程中的离子演化
DOI：
10.1088/1361-648x/abd1b7
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发表时间：
2020-12
期刊：
影响因子：
--
通讯作者：
Lu Nianpeng
中科院分区：
文献类型：
--
作者：
Gao Lei;Ji Ailing;Cao Zexian;Lu Nianpeng
离子液体门控技术是一种新型的材料设计方法，它可以驱动离子进入晶格或从晶格中脱出。虽然已经获得了许多有趣的涌现现象、新的物理性质和功能，但是控制离子和电荷输运的门控机制仍然没有被探索。在此，我们以钙钛矿型SrCoO2. 5为模型体系，通过双离子开关，研究了电场控制下纯SrCoO2. 5、氢化HSrCoO2. 5和氧化钙钛矿型SrCoO3−δ之间的三态相变过程，并对离子扩散和电子输运过程进行了细致的研究。通过设计控制门控实验，我们发现电荷传输和离子扩散之间的协同作用是促使氢或氧离子进入SrCoO_（2.5）晶格，从而导致新相形成的关键。在离电极较近的区域，电子更容易穿梭进出材料，相应地，氢（氧）离子的掺入和相变在很大程度上是相关的。随着电子的补偿电荷以及反应前沿逐渐远离电极，新相将在整个薄膜中相继形成。这一结果揭示了电场控制离子掺入和提取的潜在机制，因此为实现复杂氧化物材料中材料功能的高效设计提供了重要策略。
Ionic liquid gating (ILG) that drives the ions incorporate into or extract from the crystal lattice, has emerged as a new pathway to design materials. Although many intriguing emergent phenomena, novel physical properties and functionalities have been obtained, the gating mechanism governing the ion and charge transport remains unexplored. Here, by using the model system of brownmillerite SrCoO2.5 and the corresponding electric-field controlled tri-state phase transformation among the pristine SrCoO2.5, hydrogenated HSrCoO2.5 and oxidized perovskite SrCoO3−δ through the dual ion switch, the ionic diffusion and electronic transport processes were carefully investigated. Through controlling gating experiment by design, we find out that the collaborative interaction between charge transport and ion diffusion plays an essential role to prompt the hydrogen or oxygen ions incorporate into the crystal lattice of SrCoO2.5, and therefore leading to formation of new phases. At region closer to the electrode, the electron can shuttle more readily in (out) the material, correspondingly the incorporation of hydrogen (oxygen) ions and phase transformation is largely affiliated. With the compensated charge of electron as well as the reaction front gradually moving away from the electrode, the new phases would be developed successively across the entire thin film. This result unveils the underlying mechanism in the electric-field control of ionic incorporation and extraction, and therefore provides important strategy to achieve high efficient design of material functionalities in complex oxide materials.
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DOI：
10.4018/978-1-59140-053-0.ch001
发表时间：
2003
期刊：
--
影响因子：
--
作者：
M. Rafanelli
通讯作者：
M. Rafanelli
影响因子：
1.8
作者：
N. Mott
通讯作者：
N. Mott
FeSe 中穹顶形磁序与高压下的高温超导性竞争
影响因子：
16.6
作者：
Sun JP;Matsuura K;Ye GZ;Mizukami Y;Shimozawa M;Matsubayashi K;Yamashita M;Watashige T;Kasahara S;Matsuda Y;Yan JQ;Sales BC;Uwatoko Y;Cheng JG;Shibauchi T
通讯作者：
Shibauchi T
影响因子：
3.7
作者：
Munoz, A.;de la Calle, C.;Rivas, J.
通讯作者：
Rivas, J.
影响因子：
17.1
作者：
Lingchao Zhang;S. Zeng;Xinmao Yin;T. Asmara;P. Yang;K. Han;Yu Cao;Wenxiong Zhou;D. Wan;C. Tang;A. Rusydi;Ariando;T. Venkatesan
通讯作者：
Lingchao Zhang;S. Zeng;Xinmao Yin;T. Asmara;P. Yang;K. Han;Yu Cao;Wenxiong Zhou;D. Wan;C. Tang;A. Rusydi;Ariando;T. Venkatesan