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First order wetting of rough substrates and quantum unbinding

By Attilio L. Stella and Giovanni Sartoni


Replica and functional renormalization group methods show that, with short range substrate forces or in strong fluctuation regimes, wetting of a self–affine rough wall in 2D turns first–order as soon as the wall roughness exponent exceeds the anisotropy index of bulk interface fluctuations. Different thresholds apply with long range forces in mean field regimes. For bond–disordered bulk, fixed point stability suggests similar results, which ultimately rely on basic properties of quantum bound states with asymptotically power–law repulsive potentials

Year: 2008
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