Physics – Condensed Matter
Scientific paper
1995-12-09
Physics
Condensed Matter
41 pages, Latex(RevTex), 1 figure in file figure.ps.gz; three ref. and one acknowledgement added, suceptibility formula and mi
Scientific paper
10.1103/PhysRevB.53.15079
We consider a band of fermions in two space dimensions with a flux phase (relativistic) dispersion relation coupled to a local magnetic impurity via an $ s-d$ interaction. This model describes spinons of a flux phase and it is also a qualitative model of the quasiparticles in a $d_{x^2-y^2}$ superconductor. We find a zero-temperature phase transition at a finite coupling constant between a weak coupling unscreened impurity state and a strong coupling regime with a Kondo effect. We use large-$N$ methods to study the phase transition in this Kondo system away from marginality. The Kondo energy scales linearly with the distance to the transition . The zero-field magnetic suceptibility at zero temperature diverges linearly. Similar behavior is found in the $T$-matrix which shows a resonance at the Kondo scale. However, in addition to this simple scaling, we always find the presence of logarithmic corrections-to-scaling. Such behavior is typical of systems at an upper critical dimension. We derive an effective fermion model in one space dimension for this problem. Unlike the usual Kondo problem, this system has an intrinsic multichannel nature which follows from the spinor structure of $2+1$-dimensional relativistic fermions.
Cassanello Carlos R.
Fradkin Eduardo
No associations
LandOfFree
Kondo effect in flux phases 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 Kondo effect in flux phases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kondo effect in flux phases will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-207463