TERMINATION OF MULTIFRACTAL BEHAVIOR FOR CRITICAL DISORDERED DIRAC FERMIONS

We consider Dirac fermions interacting with a disordered non-Abelian v ector potential. The exact solution is obtained through a special type of conformal field theory including logarithmic correlators, without resorting to the replica or supersymmetry approaches. It is shown that the proper treatment of. the conformal theory leads to a different mu ltifractal scaling behavior than initially expected. Moreover, the pre vious replica solution is found to be incorrect at the level of higher correlation functions.