.png){kind=icon}
返回
Density fluctuations and the pair distribution function
.png){kind=icon}
PRE
AI
DOI：10.1103/PhysRevB.72.024111.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
In discrete systems the number density, defined as the number of particles per unit volume, is subject to fluctuations depending on the size and location of the sampling volume. Fluctuations in the local density or pair distribution function as determined from x-ray or neutron diffraction experiments, die out quickly in disordered materials but persist in crystals. Here we show that for a single atom at the origin, fluctuations persist out to very large distances and the pair distribution function does not decay, even in the case of a random system; only disappearing after ensemble averaging. Therefore, for a crystal the fluctuations in the pair distribution function persist to arbitrarily large distances. This is demonstrated here with experimental and modeling results for powdered crystalline nickel, where we find an undiminished fluctuation amplitude for the pair distribution function calculated up to distances of a micron. The characteristic separation between the peaks in the pair distribution function at large distances is determined by the thermal amplitude of vibration of a single atom and not by the interatomic spacing. Thermal broadening is included so the results obtained here are of direct experimental interest, and comparison is made to neutron diffraction data on nickel. Results are shown to be similar for crystals and for a single atom in a glass.
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
机构
暂无机构信息
引用论文
Simulation of solar based DC-DC converter for armature voltage controlled separately excited motor
PREAI
分享收藏Peak positions and shapes in neutron pair correlation functions from powders of highly anisotropic crystals -: art. no. 014303.png)
PHYSICAL REVIEW B
OAAI
PHYSICAL REVIEW BIF3.7
OAAI分享收藏Lattice dynamics and correlated atomic motion from the atomic pair distribution functionPHYSICAL REVIEW BOAAI
PHYSICAL REVIEW BIF3.7
OAAI分享收藏Local atomic structure of semiconductor alloys using pair distribution functionsPHYSICAL REVIEW B
PHYSICAL REVIEW BIF3.7
PREAI
分享收藏Abnormalities in the mechanical properties of red blood cells caused by Plasmodium falciparumBloodOAAI
BloodIF0
OAAI分享收藏分享收藏
查看更多内容