Lattice-Gas Interface Structure: A Monte Carlo Simulation

The (100), simple-cubic, lattice-gas interface structure has been simulated by Monte Carlo methods. For the interface width $L$ we find $L=(1.05\ifmmode\pm\else\textpm\fi{}0.04){(1\ensuremath{-}\frac{T}{{T}_{c}})}^{\ensuremath{-}0.69}$, in the range $T\ensuremath{\gtrsim}0.5{T}_{c}$. This is larger than the bulk correlation length $\ensuremath{\xi}$ by a factor of \ensuremath{\sim} 3.