Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconductivity in a new layered bismuth oxyselenide: LaO0.5F0.5BiSe2   We report superconductivity in a new layered bismuth oxyselenide
LaO0.5F0.5BiSe2 with the ZrCuSiAs-type structure composed of alternating
superconducting BiSe2 and blocking LaO layers. The superconducting transition
temperature is TC = 2.6K, as revealed from DC magnetization, resistivity and
muon spin rotation (muSR) experiments. DC magnetization measurements indicate a
superconducting volume fraction of approximately 80%, which is at least twice
higher in comparison to that found in corresponding sulphide LaO0.5F0.5BiS2.
Importantly, the bulk character of superconductivity in LaO0.5F0.5BiSe2 was
confirmed by muSR.

31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: eess
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc