Vertical Melting of a Stack of Membranes
  A stack of tensionless membranes with nonlinear curvature energy and vertical harmonic interaction is studied. At low temperatures, the system forms a lamellar phase. At a critical temperature, the stack disorders vertically in a melting-like transition. 
M.E.S. Borelli, H. Kleinert and Adriaan M.J. Schakel