Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-universal pairing symmetry and pseudogap phenomena in hole- and
  electron-doped cuprate superconductors   Experimental studies of the pairing state of cuprate superconductors reveal
asymmetric behaviors of the hole-doped (p-type) and electron-doped (n-type)
cuprates. The pairing symmetry, pseudogap phenomenon, low-energy spin
excitations and the spatial homogeneity of the superconducting order parameter
appear to be non-universal among the cuprates, which may be attributed to
competing orders. We propose that the non-universal pseudogap and nano-scale
variations in the quasiparticle spectra may be the result of a charge nematic
(CN) phase stabilized by disorder in highly two-dimensional (2D) p-type
cuprates. The CN phase is accompanied by gapped spin excitations and competes
with superconductivity (SC). In contrast, gapless spin excitations may be
responsible for the absence of pseudogap and the presence of excess sub-gap
spectral weight in the momentum-independent quasiparticle spectra of n-type
cuprates. The physical implications and further verifications for these
conjectures are discussed.

15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas