Curvature effects on the surface thickness and tension at the free interface of He-4 systems

Article

关键词: DENSITY-FUNCTIONAL-APPROACH;    GROUND-STATE PROPERTIES;    X-RAY;    SUPERFLUID HE-4;    LIQUID-HELIUM;    HARTREE-FOCK;    DROPLETS;    FILMS;    REFLECTIVITY;    TRANSITIONS;   

DOI  :  10.1103/PhysRevB.68.054518

来源: SCIE

【 摘 要 】

The thickness W and the surface energy sigma(A) at the free interface of superfluid He-4 are studied. Results of calculations carried out using density functionals for cylindrical and spherical systems are presented in a unified way, including a comparison with the behavior of planar slabs. It is found that for large species W is independent of the geometry. The obtained values of W are compared with prior theoretical results and experimental data. Experimental data favor results evaluated by adopting finite range approaches. The behavior of sigma(A) and Wsigma(A) exhibits overshoots similar to that found previously for the central density, and the trend of these observables towards their asymptotic values is examined.

【 授权许可】

Free