Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for High-Temperature Superconductivity in Doped Laser-Processed
  Sr-Ru-O   We have discovered that samples of a new material produced by special
processing of crystals of Sr2RuO4 (which is known to be a triplet
superconductor with Tc values ~1.0-1.5K) exhibit signatures of
superconductivity (zero DC resistance and expulsion of magnetic flux) at
temperatures exceeding 200K. The special processing includes deposition of a
silver coating and laser micromachining; Ag doping and enhanced oxygen are
observed in the resultant surface layer. The transition, whether measured
resistively or by magnetic field expulsion, is broad. When the transition is
registered by resistive methods, the critical temperature is markedly reduced
when the measuring current is increased. The resistance disappears by about
190K. The highest value of Tc registered by magneto-optical visualization is
about 220K and even higher values (up to 250K) are indicated from the
SQUID-magnetometer measurements.

9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex