Matches in SemOpenAlex for { <https://semopenalex.org/work/W1970449983> ?p ?o ?g. }
- W1970449983 abstract "We study critical Casimir forces (CCFs) ${f}_{mathrm{C}}$ for films of thickness $L$ which in the three-dimensional bulk belong to the Ising universality class and which are exposed to random surface fields (RSFs) on both surfaces. We consider the case in which, in the absence of RSFs, the surfaces of the film belong to the surface universality class of the so-called ordinary transition. We carry out a finite-size scaling analysis and show that for weak disorder, CCFs still exhibit scaling, acquiring a random field scaling variable $w$ that is zero for pure systems. We confirm these analytic predictions by Monte Carlo (MC) simulations. Moreover, our MC data show that ${f}_{mathrm{C}}$ varies as ${f}_{mathrm{C}}(wensuremath{rightarrow}0)ensuremath{-}{f}_{mathrm{C}}(w=0)ensuremath{sim}{w}^{2}$. Asymptotically, for large $L$, $w$ scales as $wensuremath{sim}{L}^{ensuremath{-}0.26}ensuremath{rightarrow}0$, indicating that this type of disorder is an irrelevant perturbation of the ordinary surface universality class. However, for thin films such that $wensuremath{simeq}1$, we find that the presence of RSFs with vanishing mean value increases significantly the strength of CCFs, as compared to systems without them, and it shifts the extremum of the scaling function of ${f}_{mathrm{C}}$ toward lower temperatures. But ${f}_{mathrm{C}}$ remains attractive." @default.
- W1970449983 created "2016-06-24" @default.
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- W1970449983 date "2015-03-13" @default.
- W1970449983 modified "2023-10-03" @default.
- W1970449983 title "Critical Casimir forces in the presence of random surface fields" @default.
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- W1970449983 doi "https://doi.org/10.1103/physreve.91.032408" @default.
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