Origin of the repulsive Casimir force in giant polarization-interconversion materials
arXiv:2210.17285 · doi:10.1103/PhysRevApplied.16.044047
Abstract
Achieving strong repulsive Casimir forces through engineered coatings can pave the way for micro- and nano-electromechanical applications where adhesive forces currently cause reliability issues. Here, we exploit Lifshitz theory to identify the requirements for repulsive Casimir forces in gyrotropic media for two limiting cases (ultra-strong gyroelectric and non-gyroelectric). We show that the origin of repulsive force in media with strong gyrotropy such as Weyl semi-metals arises from the giant interconversion of polarization of vacuum fluctuations.
arXiv comment9 pages, 4 figures
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