Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermi-surface reconstruction in a smectic phase of a high temperature
  superconductor   It is shown that, in the presence of a moderately strong C_4 symmetry
breaking (which could be produced either by lattice orthorhombicity or the
presence of an electron nematic phase), a weak, period 4, unidirectional charge
density wave ("charge stripe") order can reconstruct the Fermi surface of a
typical hole-doped cuprate to produce a small electron pocket. This form of
charge density wave order is consistent with that adduced from recent high
field NMR experiments in YBCO. The Fermi pocket has an area and effective mass
which is a rough caricature of those seen in recent high field quantum
oscillation experiments.

13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph