Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Fermi-liquid behavior at anti-ferromagnetic quantum critical point
  in heavy fermion system Ce(Cu$_{1-x}$Co$_x$)$_2$Ge$_2$   Polycrystalline samples of Ce(Cu$_{1-x}$Co$_x$)$_2$Ge$_2$ were investigated
by means of electrical resistivity $\rho$($T$), magnetic susceptibility
$\chi$($T$), specific heat $C$$_p$($T$) and thermo electric power $S$($T$)
measurements. The long-range antiferromagnetic (AFM) order, which set in at
$T$$_N$ = 4.1 K in CeCu$_2$Ge$_2$, is suppressed by non-iso-electronic cobalt
(Co) doping at a critical value of the concentration $x$$_c$ = 0.6, accompanied
by non-Fermi liquid (NFL) behavior inferred from the power law dependence of
heat capacity and susceptibility i.e. $C$($T$)/$T$ and $\chi$($T$) $\propto$
$T$$^{-1+\lambda}$ down to 0.4 K, along with a clear deviation from $T$$^2$
behavior of the electrical resistivity. However, we have not seen any
superconducting phase in the quantum critical regime down to 0.4 K.

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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph