title: Unifying model for several classes of two-dimensional phase transition.
abstract: A relatively simple and physically transparent model based on quantum percolation and dephasing is employed to construct a global phase diagram which encodes and unifies the critical physics of the quantum Hall, "two-dimensional metal-insulator," classical percolation and, to some extent, superconductor-insulator transitions. Using real-space renormalization group techniques, crossover functions between critical points are calculated. The critical behavior around each fixed point is analyzed and some experimentally relevant puzzles are addressed.
authors.affiliation: Physics Department, Ben-Gurion University, Beer Sheva 84105, Israel.
authors.forename: Yonatan
authors.initials: Y
authors.lastname: Dubi
authors.forename: Yigal
authors.initials: Y
authors.lastname: Meir
authors.forename: Yshai
authors.initials: Y
authors.lastname: Avishai