Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous electronic structure and pseudogap effects in
  Nd_1.85Ce_0.15CuO_4   We report a high-resolution angle-resolved photoemission spectroscopic
(ARPES) study of the electron-doped (n-type) cuprate superconductor
Nd_1.85Ce_0.15CuO_4. We observe regions along the Fermi surface where the
near-E_F intensity is suppressed and the spectral features are broad in a
manner reminiscent of the high-energy ``pseudogap'' in the underdoped p-type
(hole doped) cuprates. However, instead of occurring near the (pi, 0) region,
as in the p-type materials, this pseudogap falls near the intersection of the
underlying Fermi surface with the antiferromagnetic Brillouin zone boundary.

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The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph