Alternating-current relaxation of a rotating metallic particle

doi:10.1088/1674-1056/25/6/067202

Abstract

Based on a first-principles approach, we establish an alternating-current (AC) relaxation theory for a rotating metallic particle with complex dielectric constant ε_α = ε_α-σ_α/ω₀. Here ε_α is the real part, σ_α the conductivity, ω₀ the angular frequency of an AC electric field, and i=√-1. 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 ε_α) and free charges (corresponding to σ_α), 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.

Keywords: AC relaxation theory rotating metallic particle interparticle force

Received: 19 February 2016
Revised: 16 March 2016
Accepted manuscript online:

PACS:	72.15.Lh	(Relaxation times and mean free paths)
	45.20.dc	(Rotational dynamics)

Fund:

Project supported by the National Natural Science Foundation of China (Grant No. 11222544), the Fok Ying Tung Education Foundation (Grant No. 131008), the Program for New Century Excellent Talents in University, China (Grant No. NCET-12-0121), and the National Key Basic Research Program of China (Grant No. 2011CB922004).

Corresponding Authors: Ji-Ping Huang
E-mail: jphuang@fudan.edu.cn

Cite this article:

Guo-Xi Nie(聂国熹), Wen-Jia Tian(田文佳), Ji-Ping Huang(黄吉平), Guo-Qing Gu(顾国庆) Alternating-current relaxation of a rotating metallic particle 2016 Chin. Phys. B 25 067202

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Alternating-current relaxation of a rotating metallic particle

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