Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear Pauli Susceptibilities in Sr$_3$Ru$_2$O$_7$ and Universal
  Features of Itinerant Metamagnetism   We report, for the first time, measurements of the third order, $\chi_3$ and
fifth order, $\chi_5$, susceptibilities in an itinerant oxide metamagnet,
Sr$_3$Ru$_2$O$_7$ for magnetic fields both parallel and perpendicular to the
c-axis. These susceptibilities exhibit maxima in their temperature dependence
such that $T_1 \approx 2T_3 \approx 4T_5$ where the $T_i$ are the position in
temperature where a peak in the $i$-th order susceptibility occurs. These
features taken together with the scaling of the critical field with the
temperature $T_1$ observed in a diverse variety of itinerant metamagnets find a
natural explanation in a single band model with one Van Hove singularity (VHS)
and onsite repulsion $U$. The separation of the VHS from the Fermi energy
$\Delta$, sets a single energy scale, which is the primary driver for the
observed features of itinerant metamagnetism at low temperatures.

30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys