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所属单位：
晶体材料研究所
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论文名称：
High oxygen pressure floating zone growth and crystal structure of the metallic nickelates R4Ni3O10 (R = La, Pr)
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发表刊物：
Physical Review Materials
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刊物所在地：
American Physical Society
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摘要：
Single crystals of the metallic Ruddlesden-Popper trilayer nickelates R4Ni3O10 (R = La, Pr) were successfully
grown using an optical-image floating zone furnace under oxygen pressure (pO2) of 20 bar for La4 Ni3O10
and 140 bar for Pr4Ni3O10. A combination of synchrotron and laboratory x-ray single-crystal diffraction,
high-resolution synchrotron x-ray powder diffraction and measurements of physical properties revealed that
R4Ni3O10 (R = La, Pr) crystallizes in the monoclinic P21/a (Z = 2) space group at room temperature, and
that a metastable orthorhombic phase (Bmab) can be trapped by postgrowth rapid cooling. Both La4Ni3O10
and Pr4Ni3O10 crystals undergo a metal-to-metal transition (MMT) below room temperature. In the case of
Pr4Ni3O10, the MMT is found at 157.6 K. For La4Ni3O10, the MMT depends on the lattice symmetry: 147.5
K for Bmab vs 138.6 K for P21/a. Lattice anomalies were found at the MMT that, when considered together
with the pronounced dependence of the transition temperature on subtle structural differences between Bmab
and P21/a phases, demonstrate a not insignificant coupling between electronic and lattice degrees of freedom in
these trilayer nickelates.
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第一作者：
张俊杰
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论文类型：
基础研究
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论文编号：
2B237CE95864437FA4060B32BF794279
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学科门类：
工学
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一级学科：
材料科学与工程
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文献类型：
J
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卷号：
4
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页面范围：
083402
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影响因子：
3.3
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DOI码：
10.1103/PhysRevMaterials.4.083402
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是否译文：
否
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发表时间：
2020-08
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收录刊物：
SCI
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发布时间：
2020-08-20
