Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting current-phase relation in Nb/Au/(001)YBa2Cu3Ox
  heterojunctions   We probe directly the superconducting current-phase relations (CPR) of
Nb/Au/(001) YBa2Cu3Ox heterojunctions prepared in epitaxial c-axis oriented
YBa2Cu3Ox (YBCO) thin films. The measurements are performed by a
single-junction interference experiment. Atomic Force Microscope observations
and estimations made from I-V characteristics confirm the c-axis current
transport. No deviation of the current-phase relation from a sinusoidal shape
has been found within the experimental accuracy. Possible reasons of the
absence of the second harmonic in the CPR due to a second order tunneling are
discussed.

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The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics