  We study the interface effects in strangelets adopting mean-field
approximation (MFA). Based on an equivparticle model, the linear confinement
and leading-order perturbative interactions are included with density-dependent
quark masses. By increasing the confinement strength, the surface tension and
curvature term of strange quark matter (SQM) become larger, while the
perturbative interaction does the opposite. For those parameters constrained
according to the 2$M_\odot$ strange star, the surface tension is $\sim$2.4
MeV/fm${}^2$, while unstable SQM indicates a slightly larger surface tension.
The obtained results are then compared with those predicted by the multiple
reflection expansion (MRE) method. In contrast to the bag model case, it is
found that MRE method overestimates the surface tension and underestimates the
curvature term. To reproduce our results, the density of states in the MRE
approach should be modified by proper damping factors.
