Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The de Haas-van Alphen effect in Kondo systems with crystalline electric
  field   The effective mass probed by the de Haas-van Alphen oscillations is studied
for a model Ce system under magnetic field higher than the Kondo energy. In the
mean-field theory, the mass enhancement per Ce ion in the periodic system is
identical with that in the dilute system. With decreasing magnetic field, the
effective mass tends to diverge corresponding to a formation of the Kondo
ground state. The effective mass can be very different between up and down
spins depending on the nature of the 4f wave functions.

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The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
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The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc