Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: From tunneling to contact in a magnetic atom: the non-equilibrium Kondo
  effect   A low-temperature scanning tunneling microscope was employed to study the
differential conductance in an atomic junction formed by an adsorbed Co atom on
a Cu(100) surface and a copper-covered tip. A zero-bias anomaly (ZBA) reveals
spin scattering off the Co atom, which is assigned to a Kondo effect. The ZBA
exhibits a characteristic asymmetric lineshape when electrons tunnel between
tip and sample, while upon the tip-Co contact it symmetrizes and broadens.
Through density functional theory calculations and the non-equilibrium
non-crossing approximation we show that the lineshape broadening is mainly a
consequence of the additional coupling to the tip, while non-equilibrium
effects only modify the large-bias tails of the ZBA.

16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph