Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unified description of resistivity and thermopower of Pr$_2$Ir$_2$O$_7$:
  possible influence of crystal field excitation in a Kondo lattice   We present experimental evidence of incoherent Kondo scattering as the source
of resistivity minima in bulk polycrystalline and nanocrystalline
Pr$_2$Ir$_2$O$_7$. The temperature dependence of thermopower shows a positive
maximum at high temperature followed by a negative minimum at low temperature,
with the sign inversion occurring at a much higher temperature than $T_K$.
Moreover, we observe little correlation between TK and intersite coupling
strength given by $\theta_{CW}$. We describe the temperature dependence of
thermopower and resistivity within the framework of crystal field excitation in
a Kondo lattice.

13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex