Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interplay of Spin-Orbit Interaction and Electron Correlation on the Van
  Vleck Susceptibility in Transition Metal Compounds   We have studied the effects of electron correlation on Van Vleck
susceptibility ($\chi_{\rm{VV}}$) in transition metal compounds. A typical
crossover behavior is found for the correlation effect on $\chi_{\rm{VV}}$ as
sweeping spin-orbit interaction, $\lambda$. For a small $\lambda$, orbital
fluctuation plays a dominant role in the correlation enhancement of
$\chi_{\rm{VV}}$; however, the enhancement rate is rather small. In contrast,
for an intermediate $\lambda$, $\chi_{\rm{VV}}$ shows a substantial increase,
accompanied by the development of spin fluctuation. We will discuss the
behavior of $\chi_{\rm{VV}}$ in association with the results of Knight-shift
experiments on Sr$_2$RuO$_4$ and an anomalously large magnetic susceptibility
observed for $5d$ Ir compounds.

0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
16
The categories of this paper are: stat
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas