Observation of vertex-rounding transition for a crystal in
equilibrium: Oxygen-covered tungsten, A. Szczepkowicz, R. Bryl, Phys. Rev. B. 71 (2005) 113416.
Equilibrium crystal shape of oxygen-covered tungsten is followed as a
function of temperature using field ion microscopy. In the vicinity of
the (111) region, at the temperature 970+-70~K, the system undergoes a
phase transition from a polyhedral form (sharp edges and sharp vertex)
to a rounded form (sharp edges, rounded vertex).
68.35.Md Surface thermodynamics, surface energies
68.60.Dv Thermal stability; thermal effects
68.37.Vj Field emission and field-ion microscopy
Surface topography, Equilibrium thermodynamics and statistical
mechanics, Faceting, Tungsten, Oxygen, Single crystal surfaces, Curved
surfaces, Field ion microscopy