Energetics and structure ofHe4droplets at a finite temperature

Bound quantum-liquid ${(}^4$He${)}_{\mathrm{n}}$ droplets (n=57, 120, and 270) at 3 K coexisting with saturated vapor are studied with use of quantum path-integral molecular dynamics. The diffuse nature of the droplets and their pachydermatous behavior extends to larger sizes in comparison to the corresponding clusters at zero temperature. For the largest droplet a core liquid region develops, exhibiting properties in agreement with bulk data.