Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence of the impurity spin coupling with quantum paraelectric
  fluctuations in CaTi1-xRuxO3   Quantum paraelectrics are materials in which a long-range
ferroelectric/antiferroelectric order is suppressed by quantum fluctuations,
i.e. zero-point motion of the lattice prevents condensation of the soft polar
phonon mode even at T = 0 K. The most prominent quantum paraelectric materials
are SrTiO3, KTaO3, and CaTiO3. Here we focus on peculiar properties of the
pseudo-cubic perovskite CaTi1-xRuxO3 system. Namely, as soon as any
concentration of either Ru or Ti is introduced into the pure compounds, a
concentration-independent ferromagnetic-like transition occurs at low
temperatures. We present the experimental evidence of the spin-polarized ground
state of CaTi1-xRuxO3 induced by coupling of magnetic moments of Ru impurities
with quantum paraelectric fluctuations in the host compound CaTiO3.

25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat