STM AND RHEED EXPERIMENTS ON NONEQUILIBRIUM SURFACE-STRUCTURES OF THEAU(110) SURFACE

The Au(110) surface is studied by scanning tunneling microscopy (STM) and reflection high energy electron diffraction (RHEED). The surface i s rapidly cooled from above the order-disorder transition temperature of T-c = 650 K to room temperature. The STM reveals some details of th e disordered state, i.e. a preference of [110] chains of varying lengt hs as the most obvious short range structural elements. The first long range order structural features are (1 x 3) rather than (1 x 2) islan ds. The (1 x 2) structure needs some energy input to be formed. The RH EED analysis is done while the target is heated in the range from room temperature to above T-c. The RHEED experiments give information abou t the disordered state, as well as the annealing and the order-disorde r phase transition.