Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relation between width of the zero-bias anomaly and Kondo temperaure in
  transport measurements through correlated quantum dots: Effect of asymmetric
  coupling to the leads   The zero-bias anomaly at low temperatures, originated by the Kondo effect
when an electric current flows through a system formed by a spin-$1/2$ quantum
dot and two metallic contacts is theoretically investigated. In particular, we
compare the width of this anomaly $2T_{\rm NE}$ with that of the Kondo
resonance in the spectral density of states $2T_{K}^{\rho}$, obtained from a
Fano fit of the corresponding curves and also with the Kondo temperature,
$T_K^G$, defined from the temperature evolution of the equilibrium conductance
$G(T)$. In contrast to $T_K^G$ and $2T_{K}^{\rho}$, we found that the scale
$2T_{\rm NE}$ strongly depends on the asymmetry between the couplings of the
quantum dot to the leads while the total hybridization is kept constant. While
the three scales are of the same order of magnitude, $2T_{\rm NE}$ and
$T_{K}^{\rho}$ agree only in the case of large asymmetry between the different
tunneling couplings of the contacts and the quantum dot. On the other hand, for
similar couplings, $T_{\rm NE}$ becomes larger than $T_{K}^{\rho}$, reaching
the maximum deviation, of the order of $30\%$, for identical couplings. The
fact that an additional parameter to $T_{\rm NE}$ is needed to characterize the
Kondo effect, weakenig the universality properties, points that some caution
should be taken in the usual identification in experiments of the low
temperature width of the zero-bias anomaly with the Kondo scale. Furthermore,
our results indicate that the ratios $T_{\rm NE}/T_K^G$ and
$T_{K}^{\rho}/T_K^G$ depend on the range used for the fitting.

23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph