石墨烯片限制的水纳米层中的卡西米尔力
Casimir force in a water nanolayer confined by graphene sheets
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中文总结 AI 辅助
本文理论研究了水纳米层隔开的石墨烯片间的卡西米尔力，发现限制效应在薄层时降低力最多26%，厚层时体相模型低估最多42%，且效应非单调，在70纳米处最大。
中文摘要 AI 辅助
卡西米尔力源于量子涨落和热涨落，强烈依赖于相互作用材料的电磁极化率。在此，我们理论研究了由纳米级薄层液态水隔开的两个石墨烯片之间的卡西米尔力。我们发现，在厚度不超过3.4纳米时，与体相情况相比，限制作用使卡西米尔力最多降低26%。在更大厚度下，由于界面效应，体相模型低估卡西米尔力最多达42%。该效应并不随层厚单调减小：它在70纳米处增至最大值，并仅在2微米处缓慢衰减至体相极限。我们单独评估了纳米尺度限制对石墨烯电子响应的影响，该影响对卡西米尔力没有作用。
英文摘要
Casimir forces, arising from quantum and thermal fluctuations, depend strongly on the electromagnetic susceptibilities of the interacting materials. Here, we theoretically investigate the Casimir force between two graphene sheets separated by a nanometer-thin layer of liquid water. We find that deviations from the bulk case can be as large as 24 \%, mostly due to the static susceptibility components. This effect does not decrease monotonically as a function of the layer thickness: it increases up to a maximum at 70 nm and it slowly declines to the bulk limit only at 1 micron. This is due to two competing effects: on one hand, the anisotropy decreases with the layer thickness; on the other hand, the relative contribution of the most anisotropic, static susceptibility components increases.
发表机构
- Zernike Institute for Advanced Materials, University of Groningen（格罗宁根大学泽尼克高级材料研究所）
- Chinese Academy of Sciences Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所软物质物理重点实验室）
- Wenzhou Institute, University of Chinese Academy of Sciences（中国科学院大学温州研究院）
- Faculty of Mathematics and Physics, University of Ljubljana（卢布尔雅那大学数学与物理学院）
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