Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impurity-induced quasiparticle interference in the parent compounds of
  iron-pnictide superconductors   The impurity-induced quasiparticle interference(QPI) in the parent compounds
of iron-pnictide superconductors is investigated based on a phenomenological
two-orbital four-band model and T-matrix method. We find the QPI is sensitive
to the value of the magnetic order which may vary from one compound to another.
For small value of the magnetic order, the pattern of oscillation in the local
density of states (LDOS) induced by the QPI exhibits two-dimensional
characteristics, consistent with the standing wave state observed in the 1111
compound. For larger value of the magnetic order, the main feature of the
spatial modulation of the LDOS is the existence of one-dimensional stripe
structure which is in agreement with the nematic structure in the parent
compound of the 122 system. In both cases the system shows $C_2$ symmetry and
only in the larger magnetic order case, there exist in-gap bound states. The
corresponding QPI in $q$-space is also presented. The patterns of modulation in
the LDOS at nonzero energies are attributed to the interplay between the
underlying band structure and Fermi surfaces.

26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg