Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low temperature thermodynamic properties near the field-induced quantum
  critical point in DTN   We present a comprehensive experimental and theoretical investigation of the
thermodynamic properties: specific heat, magnetization and thermal expansion in
the vicinity of the field-induced quantum critical point (QCP) around the lower
critical field $H_{c1} \approx 2$\,T in DTN . A $T^{3/2}$ behavior in the
specific heat and magnetization is observed at very low temperatures at
$H=H_{c1}$ that is consistent with the universality class of Bose-Einstein
condensation of magnons. The temperature dependence of the thermal expansion
coefficient at $H_{c1}$ shows minor deviations from the expected $T^{1/2}$
behavior. Our experimental study is complemented by analytical calculations and
Quantum Monte Carlo simulations, which reproduce nicely the measured
quantities. We analyze the thermal and the magnetic Gr\"{u}neisen parameters
that are ideal quantities to identify QCPs. Both parameters diverge at $H_{c1}$
with the expected $T^{-1}$ power law. By using the Ehrenfest relations at the
second order phase transition, we are able to estimate the pressure
dependencies of the characteristic temperature and field scales.

37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat