Ruddlesden-Popper双层镍酸La3Ni2O7的温度结构演化

IF 4.7 2区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Pub Date : 2025-01-10 DOI:10.1021/acs.inorgchem.4c03042

Haozhe Wang, Haidong Zhou, Weiwei Xie

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引用次数: 0

摘要

最近的一篇文章(j.a.m。化学。Soc. 2024, 146, 7506-7514)详细描述了Ruddlesden-Popper双层镍酸盐La3Ni2O7 （LNO-2222）使用同步加速器x射线衍射的压力-温度（P-T）相图。本研究确定了在104-120 K的初始压力下，从Amam（#63）到Fmmm（#69）的相变，并将I4/mmm（#139）空间群归因于LNO-2222的超导结构。在此，我们研究了LNO-2222单晶在环境压力下的温度依赖结构演化。与对称性增加和建立的Amam - fmmm相边界相反，我们观察到随着温度的降低，Amam反射增强。这项工作不仅在不同温度下使用实验室x射线提供了LNO-2222的高质量晶体学数据，而且还增强了对该系统复杂晶体学行为的理解，为进一步的实验和理论探索提供了见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Temperature-Dependent Structural Evolution of Ruddlesden–Popper Bilayer Nickelate La3Ni2O7

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Temperature-Dependent Structural Evolution of Ruddlesden–Popper Bilayer Nickelate La3Ni2O7

A recent article ( J. Am. Chem. Soc. 2024, 146, 7506–7514) details a pressure–temperature (P–T) phase diagram for the Ruddlesden–Popper bilayer nickelate La₃Ni₂O₇ (LNO-2222) using synchrotron X-ray diffraction. This study identifies a phase transition from Amam (#63) to Fmmm (#69) within the temperature range of 104–120 K under initial pressure and attributes the I4/mmm (#139) space group to the structure responsible for the superconductivity of LNO-2222. Herein, we examine the temperature-dependent structural evolution of LNO-2222 single crystals at ambient pressure. Contrary to the symmetry increase and the established Amam–Fmmm phase boundary, we observe an enhancement in the Amam reflections as temperature decreases. This work not only delivers high-quality crystallographic data of LNO-2222 using laboratory X-rays across various temperatures but also enhances the understanding of the complex crystallographic behavior of this system, contributing insights to further experimental and theoretical explorations.

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来源期刊

Inorganic Chemistry 化学-无机化学与核化学

CiteScore

7.60

自引率

13.00%

发文量

1960

审稿时长

1.9 months

期刊介绍： Inorganic Chemistry publishes fundamental studies in all phases of inorganic chemistry. Coverage includes experimental and theoretical reports on quantitative studies of structure and thermodynamics, kinetics, mechanisms of inorganic reactions, bioinorganic chemistry, and relevant aspects of organometallic chemistry, solid-state phenomena, and chemical bonding theory. Emphasis is placed on the synthesis, structure, thermodynamics, reactivity, spectroscopy, and bonding properties of significant new and known compounds.