Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exciton effects in a scaling theory of intermediate valence and Kondo
  systems   An interplay of the Kondo scattering and exciton effects (d-f Coulomb
interaction) in the intermediate valence systems and Kondo lattices is
demonstrated to lead to an essential change of the scaling behavior in
comparison with the standard Anderson model. In particular, a marginal regime
can occur where characteristic fluctuation rate is proportional to flow cutoff
parameter. In this regime the "Kondo temperature" itself is strongly
temperature dependent which may give a key to the interpretation of
controversial experimental data for heavy fermion and related systems.

28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
9
The categories of this paper are: nlin