Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum criticality at the superconductor insulator transition probed by
  the Nernst effect   The superconductor-insulator transition (SIT) is an excellent example for a
quantum phase transition at zero temperature, dominated by quantum
fluctuations. These are expected to be very prominent close to the quantum
critical point. So far most of the experimental study of the SIT has
concentrated on transport properties and tunneling experiments which provide
indirect information on criticality close to the transition. Here we present an
experiment uniquely designed to study the evolution of quantum fluctuations
through the quantum critical point. We utilize the Nernst effect, which has
been shown to be effective in probing superconducting fluctuation. We measure
the Nernst coefficient in amorphous indium oxide films tuned through the SIT
and find a large signal on both the superconducting and the insulating sides
which peaks close to the critical point. The transverse Peltier coefficient,
$\alpha_{xy}$ which is the thermodynamic quantity extracted from these
measurements, follows quantum critical scaling with critical exponents $\nu
\sim 0.7$ and $z \sim 1$ which is consistent with a clean XY model in 2+1
dimensions.

2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an