Dynamically preferred state with strong electronic fluctuations from electrochemical synthesis of sodium manganate

Dynamically preferred state with strong electronic fluctuations from electrochemical synthesis of sodium manganate
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锰酸钠电化学合成具有强电子波动的动态优选状态

DOI:
10.1016/j.matt.2021.12.012
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发表时间:
2022
期刊:
影响因子:
18.9
通讯作者:
Lynn, Jeffrey W.
Lynn, Jeffrey W.
中科院分区:
材料科学1区
文献类型:
--
作者:
Chen, Xi;Wang, Yichao;Wang, Yiping;Dally, Rebecca L.;Wiaderek, Kamila;Qiao, Tianyu;Liu, Jue;Hu, Enyuan;Burch, Kenneth;Lynn, Jeffrey W.

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电化学插(脱)层是精确控制碱性过渡金属氧化物中碱性离子组成的精细方法。由于复杂的相互作用,金属电荷有序模式可以自发地形成在特定的分数碱性组成和排序。在这里,我们表明,这种优雅的电化学过程可以创建动态优选的结构,在非谐能量景观,传统的合成和计算可以很少访问。具体而言,电化学制备的Na 1/2 MnO 2有序表现出异常的结构畸变,电荷有序,和动力学活动。强烈的磁波动和晶格动力学观察到在一个异常宽的温度范围内,在Na 1/2 MnO 2,这使它区别于所有其他NaxMnO 2在较高或较低的Na组合物。这些结果强调了使用电化学过程设计和创建具有强耦合和相互增强的电子和晶格波动的新型量子态的独特机会,可能通过特殊的动态电荷通量泛函,正如我们的计算研究所建议的那样。
Electrochemical (de)intercalation is a delicate method to precisely control the alkaline ion composition in alkaline transition metal oxides. Because of complicated interactions, metal charge ordering patterns can form spontaneously at special fractional alkaline compositions and orderings. Here, we show that this elegant electrochemical process can create dynamically preferred structures in an anharmonic energy landscape that conventional syntheses and computations can rarely visit. Specifically, electrochemically prepared Na1/2MnO2ordering exhibits abnormal structure distortions, charge orderings, and dynamical activities. Strong magnetic fluctuations and lattice dynamics are observed in an unusually wide temperature range in Na1/2MnO2, which distinguishes it from all other NaxMnO2at higher or lower Na compositions. The results emphasize the unique opportunity of using electrochemical processes to design and create novel quantum states with strongly coupled and mutually enhanced electronic and lattice fluctuations, likely through a special dynamic charge flux functional, as suggested by our computational investigations.
O3/P3 结构族中的 NaxCoO2 相稳定性和分级排序
DOI: --
发表时间: 2019
影响因子: 3.4
作者:
J. Kaufman;Anton Van der Ven
通讯作者: Anton Van der Ven
影响因子: 1.4
作者:
IKEDA, S;CARPENTER, JM
通讯作者: CARPENTER, JM
DOI: --
发表时间: 2018
期刊: Physical review B
影响因子: 3.7
作者:
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DOI: 10.1080/00150199208015075
发表时间: 1992
期刊: Ferroelectrics
影响因子: 0.8
作者:
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