Анотація:
Recently new type of high temperature superconductors is found which are characterized by the existence of circular molecular orbits in each unit site of 2D s/p electron system. In view of the characteristic, a new model of superfluidity is studied based on the coherent state where the zero-point oscillation of toroidal wave function causes a macroscopic quantum state. This model gives an estimation of the superfluidity transition temperature: Tc≈52-117 K for fcc C60, and Tc≈50-150 K for hole-doped MgB2.