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Contour plot of the total heat flux as function of and for : (a) and (b) . The figures in the inset show the variations in the heat flux as a function of using determined via Eq. (4).
Total heat flux as a function of the vacuum gap for different . The films are maintained at 300 and 0 K.
(a) Exchange function as a function of and . (b) Product of with , , as a function of and . The vertical lines in panel (a) indicate the cut-off for different separation gaps .
Real and imaginary parts of the dielectric function maximizing near-field heat transfer as a function of .
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