Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hole doping and weak quenched disorder effects on the 1D Kondo lattice
  for ferromagnetic Kondo couplings   We investigate the one-dimensional Kondo lattice model (1D KLM) for
ferromagnetic Kondo couplings, by using the bosonization method. The
ferromagnet ic 2-leg spin ladder and the S=1 antiferromagnet occur as new
one-dimensional Kondo insulators, for a half-filled band. First,a very small
hole-doping makes the charge sector massless and it can produce, either an
incommensurate RKKY interaction or a S=1 ferromagnet according to the strength
of the ferromagnetic Kondo coupling. Second, we investigate, the effects of a
weak and quenched disorder on these two Kondo insulators, by applying
renormalization group methods: the Anderson localization is suppressed only in
the context of a strong ferromagnetic Kondo coupling.

27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg