Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
1999-02-26
Nucl.Phys. B562 (1999) 477-496
Physics
Condensed Matter
Disordered Systems and Neural Networks
12 pages, revtex, 1 figure
Scientific paper
10.1016/S0550-3213(99)00494-0
A two dimensional random hopping model with N-species and \pi-flux is studied. The field theory at the band center is shown to be in the universality class of GL(4m,R)/O(4m) nonlinear sigma model. Vanishing beta function suggests delocalised states at the band center. Contrary to the similar universality class with broken time reversal symmetry, the present class is expected to have at least two fixed point. Large N-systems are shown to be in the weak-coupling fixed point, which is characterized by divergent density of state, while small N systems may be in the strong-coupling fixed point.
No associations
LandOfFree
Critical behavior of two-dimensional random hopping fermions with π-flux does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Critical behavior of two-dimensional random hopping fermions with π-flux, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Critical behavior of two-dimensional random hopping fermions with π-flux will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-328496