abstract:The hexatic phase is a phase that is between the solid and the isotropic liquid phases in two dimensional systems of particles. It is characterized by two order parameters: a short-range positional and a quasi-long-range orientational (sixfold) order.
An intermediate surface hexaticphasebetweentheliquidand the crystalline phases has been found for the first time in a lyotropic lamellarliquid-crystalsystem.