Alternating-current relaxation of a rotating metallic particle

Based on a first-principles approach,we establish an alternating-current（AC） relaxation theory for a rotating metallic particle with complex dielectric constant εα=εα-iσα/ω0.Here εα is the real part,σα the conductivity,ω0 the angular frequency of an AC electric field,and i=-11/2.Our theory yields an...

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Bibliographic Details
Published in:Chinese physics B 2016-06, Vol.25 (6), p.433-438
Main Author: 聂国熹 田文佳 黄吉平 顾国庆
Format: Article
Language:English
Subjects:
Accuracy
Alternating current
Dielectric constant
Dynamics
Electric fields
Metal particles
Reduction
Rotating
交流电场
交流电流
复介电常数
弛豫时间
旋转
第一性原理
自由电荷
金属粒子
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Summary:Based on a first-principles approach,we establish an alternating-current（AC） relaxation theory for a rotating metallic particle with complex dielectric constant εα=εα-iσα/ω0.Here εα is the real part,σα the conductivity,ω0 the angular frequency of an AC electric field,and i=-11/2.Our theory yields an accurate interparticle force,which is in good agreement with the existing experiment.The agreement helps to show that the relaxations of two kinds of charges,namely,surface polarized charges（described by εα） and free charges（corresponding to σα）,contribute to the unusually large reduction in the attracting interparticle force.This theory can be adopted to determine the relaxation time of dynamic particles in various fields.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/25/6/067202