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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.
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一个用于调节Jahn-Teller效应的轨道战略.

Tongtong Shang1,2, Ang Gao1,2, Dongdong Xiao2,3

  • 1State Key Laboratory of New Ceramics and Fine Processing, National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.

National science review
|August 23, 2024
PubMed
概括

研究人员开发了一种局部坐标策略,以控制过渡金属氧化物中的Jahn-Teller效应 (JTE). 这种方法精确地操纵轨道占用率和连接体对称性,使先进的功能材料具有量身定制的材料特性.

关键词:
杰恩·泰勒效应是什么?地方协调战略.发生轨道退化.定量收光束电子衍射的定量收光束.过渡金属氧化物 过渡金属氧化物

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科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学
  • 固态化学 固态化学

背景情况:

  • 雅恩-泰勒效应 (JTE) 显著影响过渡金属化合物的物理性质,由于晶格-电子合.
  • 定制材料功能需要精确控制JT扭曲和相关的电子结构.

研究的目的:

  • 提出并演示一种新的局部坐标策略,用于调节过渡金属氧化物中Jahn-Teller效应.
  • 为设计具有可调节格子-轨道合和特定物理性质的功能材料提供指导方针.

主要方法:

  • 在 (Mn) 的eg和t2g轨道中的量化轨道占用率.
  • 仔细研究了MnO6八面体内的联体氧原子在LiMn2O4和Li0.5Mn2O4中的对称性.
  • 构建了P2型NaLixMn1-xO2氧化物,使用不同的Li/Mn排序方案来验证该策略.

主要成果:

  • 证明了当地协调策略在控制JT扭曲方面的有效性.
  • 展示了该策略对各种3D过渡金属化合物在旋和矿结构中的适用性.
  • 证实了局部坐标策略的普遍性和格子轨道合的可调性.

结论:

  • 当地坐标策略提供了一种强大的方法来调节过渡金属氧化物中的JT扭曲.
  • 这种方法有助于设计具有可预测和可取的物理性质的高级功能材料.
  • 这些发现为未来的材料设计和发现提供了宝贵的见解.