Physics – Condensed Matter
Scientific paper
1993-02-26
Physics
Condensed Matter
29 pages (2 figures upon request from fazekas@itsictp.bitnet), LATEX, submitted for publication
Scientific paper
10.1103/PhysRevB.48.7274
A multi--channel generalization of Doniach's Kondo necklace model is formulated, and its phase diagram studied in the mean--field approximation. Our intention is to introduce the possible simplest model which displays some of the features expected from the overscreened Kondo lattice. The $N$ conduction electron channels are represented by $N$ sets of pseudospins $\vt_{j}$, $j=1, ... , N$, which are all antiferromagnetically coupled to a periodic array of $|\vs|=1/2$ spins. Exploiting permutation symmetry in the channel index $j$ allows us to write down the self--consistency equation for general $N$. For $N>2$, we find that the critical temperature is rising with increasing Kondo interaction; we interpret this effect by pointing out that the Kondo coupling creates the composite pseudospin objects which undergo an ordering transition. The relevance of our findings to the underlying fermionic multi--channel problem is discussed.
Fazekas Patrik
Kee Hae-Young
No associations
LandOfFree
Multi-Channel Kondo Necklace 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 Multi-Channel Kondo Necklace, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-Channel Kondo Necklace will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-676213