淬灭随机极化诱导的涨落力
Quenched fluctuation-induced force arising from polarization disorder
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中文总结 AI 辅助
该研究探究淬灭随机极化诱导的涨落力的零温行为，分析两类系统中体内与表面偶极无序诱导涨落力的变化规律，发现其可增强特定三层电介质系统的纳米悬浮效应。
中文摘要 AI 辅助
我们研究了被冻结在材料中、无法发生热涨落的随机电偶极子诱导的涨落力的零温行为，这类材料的例子包括弛豫铁电体。在装置与几何结构方面，我们重点研究两类系统：一是由两块共面半无限平板组成、间距为ℓ的分层系统；二是位于半无限平板表面上方真空处、间距为ℓ的中性原子系统。对于这两类系统，我们分别考虑淬灭随机偶极无序发生在平板体内以及平板表面的情况。在所有这些情形中，我们发现：体内（表面）偶极无序诱导的涨落力，随单位体积（单位面积）内淬灭电偶极矩的均方值增长；两块半无限单层平板间由体内（表面）偶极无序诱导的涨落压强，随ℓ⁻³（ℓ⁻⁴）衰减；真空处原子附近含无序平板诱导的体内（表面）偶极无序涨落力，随ℓ⁻⁴（ℓ⁻⁵）衰减。我们还发现，两块共面平板间由淬灭偶极无序诱导的涨落力可以是排斥性的，能够增强满足Dzyaloshinskii-Lifshitz-Pitaevskii条件的三层电介质系统中的“纳米悬浮效应”。
英文摘要
We investigate the zero-temperature behavior of the fluctuation force induced by the quenched disorder of electric dipoles frozen randomly into a material. Examples of such materials include relaxor ferroelectrics. In terms of the setup and geometry, we focus on a layered system comprising two coplanar semi-infinite slabs separated by a distance $\ell$ as well as a system comprising a neutral atom in the vacuum located at a distance $\ell$ above the surface of a semi-infinite slab. For both systems, we consider the cases where the quenched random dipolar disorder occurs inside the bulk as well as on the surface of the slabs. In all of these cases, we find that the bulk (surface) dipolar disorder-induced force grows with the mean square quenched electric dipole moment per unit volume (area). The bulk (surface) dipolar disorder-induced pressure between two semi-infinite single-layered slabs decays with $\ell^{-3}$ ($\ell^{-4}$), whereas the bulk (surface) dipolar disorder-induced force on an atom in the vacuum near a slab containing the disorder decays with $\ell^{-4}$ ($\ell^{-5}$). We also find that the quenched dipolar disorder-induced force between two coplanar slabs can be repulsive in a three-layered dielectric system that obeys a zero-frequency analogue of the Dzyaloshinskii-Lifshitz-Pitaevskii condition, and serve to enhance the ``nanolevitation effect" if the latter is present in the disorder-free system.
发表机构
- College of Arts and Sciences, American University of Sharjah（阿拉伯联合酋长国沙迦美国大学文理学院）
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