Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pressure-induced enhancement of two-dimensionality in LaO1-xFxBi(Se/S)2
  superconductors   Application of high pressure (HP) induces evolution from metallic to
semi-metallic state in the layered superconducting LaO1-xFxBiSe2 phase, as
concluded from ab initio calculations based on experimental P-dependent
structural data. These changes in conduction properties are associated with a
reported decrease in the superconducting transition temperature, Tc. However,
further increase in pressure induces structural transformation in LaO1-xFxBiSe2
which results in a strong enhancement of its two-dimensionality with a related
improvement in superconducting performance. In addition, the HP structural
anisotropy induces a loss of long-range order correlations along the stacking
direction of the LaO/F and BiSe2 layers yielding formation of stacking faults.
Similar but even more pronounced structural transition was observed in the
related LaO1-xFxBiS2 phase which is also accompanied by an increase in Tc. This
demonstrates that enhancement of two-dimensionality in layered superconducting
systems acts in favor of their superconducting performance.

7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an