Dislocation-mediated melting of a two-dimensional crystal

  title={Dislocation-mediated melting of a two-dimensional crystal},
  author={Ludovic Pauchard and Daniel Bonn and J. L. Meunier},
MELTING of three-dimensional solids usually starts at the free surface, which typically melts at a lower temperature than the bulk material1. In two dimensions the starting point of many studies is the Kosterlitz–Thouless theory2,3, in which melting is initiated through dislocation unbinding. Langmuir mono-layers—single layers of amphiphilic molecules formed at the air-water interface—should provide an ideal model for studying melting in two dimensions. Here we show that for monolayer crystals… CONTINUE READING