The Disorder-Induced Delocalization and Unbinding Transitions
Abstract
The interaction of a directed path with extended defects and a background of point disorders is investigated systematically. The nature of the disorder-induced phase transitions, e.g., the unbinding transition from an attractive hard wall and the delocalization transition from an attractive bulk (columnar) defect, has been a subject of much recent interest and controversies. We introduce a model which interpolates between these two cases. A systematic analysis yields four renormalization-group fixed points, compared to just two in the case of thermal-induced transitions. It is shown that the disorder-induced unbinding and delocalization transitions belong to different universality classes.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 1996
- Bibcode:
- 1996APS..MAR.K2013L