Rotating quantum liquids crystallize
  Small crystallites form when finite quantal systems are set highly rotating. This crystallization is independent of the statistics of the particles, and occurs for both trapped bosons and fermions. The spin degree of freedom does not change the tendency for localization. In a highly rotating state, the strongly correlated bosonic and fermionic systems approach to that of classical particles. 
S.M. Reimann, M. Koskinen, Y. Yu, and M. Manninen