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arXiv 1202.0478quant-phcond-mat.mtrl-sci
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在不改变介电常数的情况下观察Casimir力的减小

Observation of reduction in Casimir force without change of dielectric permittivity

A. A. Banishev, C. -C. Chang, R. Castillo-Garza, G. L. Klimchitskaya, V. M. Mostepanenko, U. Mohideen

摘要:

提供了额外的信息上的效果的显着(高达35%)减少的幅度之间的卡西米尔力的Au涂层的球体和氧化铟锡膜,这是观察后,后者的UV处理。这种效应的一个显著特点是,减少是不伴随着相应的变化的介电常数,直接椭圆偏振测量证实。的测量数据进行了比较与计算使用Lifshitz理论。它表明,未处理的样品的数据是在一个非常好的协议与理论考虑到自由载流子在氧化铟锡。UV处理样品的数据不包括考虑自由载流子获得的理论结果。这些数据被发现是在一个非常好的协议与理论忽略了自由载流子在氧化铟锡膜。通过与其它相关实验的比较,讨论了铟锡氧化物从金属态到介电态的相变对观测结果的可能理论解释。

英文摘要:

Additional information is provided on the effect of the significant (up to 35%) reduction in the magnitude of the Casimir force between an Au-coated sphere and an indium tin oxide film which was observed after UV treatment of the latter. A striking feature of this effect is that the reduction is not accompanied with a corresponding variation of the dielectric permittivity, as confirmed by direct ellipsometry measurements. The measurement data are compared with computations using the Lifshitz theory. It is shown that the data for the untreated sample are in a very good agreement with theory taking into account the free charge carriers in the indium tin oxide. The data for the UV-treated sample exclude the theoretical results obtained with account of free charge carriers. These data are found to be in a very good agreement with theory disregarding the free charge carriers in an indium tin oxide film. A possible theoretical explanation of our observations as a result of phase transition of indium tin oxide from metallic to dielectric state is discussed in comparison with other related experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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