经典的二维集群的结构阶段,具有竞争的两体和三体相互作用
Matheus V Correia1, Emerson J Freitas1, Leonardo R E Cabral1
1Departamento de Física, Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, Recife-PE 50670-901, Brasil.
概括
三体相互作用显著改变粒子集群,导致它们收缩并变得自我维持. 这种紧缩可以触发相位过渡,揭示超出简单的对联力之外的新型集群结构.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 软物质物理学 软物质物理学
- 统计力学 统计力学
背景情况:
- 在粒子系统建模中,超出双向力之外的多体相互作用经常被忽视.
- 即使是微小的三体术语也可以大大改变集体粒子的行为.
- 了解这些影响对于准确建模各种物理系统至关重要.
研究的目的:
- 为了研究三体相互作用对二维和约束粒子集群的影响.
- 为了分析结构和稳定性的变化,随着三体潜力的强度的变化.
- 探索向自给自足,凝聚力集群的过渡.
主要方法:
- 模拟的集群具有三种类型的对交互: log (r), 1/r 和 exp (r) / r.
- 引入了一个有吸引力的高斯三体潜力.
- 评估了平衡和超稳定状态的能量和正常模式光谱.
主要成果:
- 在某个值以上,三体相互作用会导致集群缩小并变得自我维持.
- 压缩可以是连续的或突然的,表现出第一阶段过渡的特征.
- 观察到压缩前的新型结构重排,在对式系统中没有看到.
结论:
- 三体相互作用对于理解集群凝聚力和稳定性至关重要.
- 它们可以在封闭粒子系统中诱导显著的结构变化和相变.
- 这些发现与超导体,合体和粉尘等离子体等系统有关.
相关概念视频
Molecular Orbital Theory II
19.4K
Molecular Orbital Energy Diagrams
19.4K
First Law: Particles in Two-dimensional Equilibrium
5.1K
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...
Newton's first law tells us about...
5.1K
Hybridization of Atomic Orbitals I
47.4K
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...
47.4K
MO Theory and Covalent Bonding
10.6K
The molecular orbital theory describes the distribution of electrons in molecules in a manner similar to the distribution of electrons in atomic orbitals. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital. Mathematically, the linear combination of atomic orbitals (LCAO) generates molecular orbitals. Combinations of in-phase atomic orbital wave functions result in regions with a high probability of electron density, while...
10.6K
Molecular Orbital Theory I
32.3K
Overview of Molecular Orbital Theory
32.3K
Crystal Field Theory - Tetrahedral and Square Planar Complexes
43.1K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
43.1K


