Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ARPES in strongly disordered systems -- theory of electronic bands
  melting   It is well known that translational symmetry-breaking disorder will disrupt
ARPES spectra up to the point where they become invisible. However, a
theoretical framework to capture this phenomenon has been largely missing.
Here, based on a rigorous theory of the ARPES process, we provide this
much-needed framework. In particular, we show how the frequently used sudden
electron approximation has to be modified in this situation. Our main result is
an argument that links the photoemission line broadening with an operator
content of a disorder operator and so with the criticality of the corresponding
order-disorder phase transition. For concreteness, we focus here on the
frustrated 2D trigonal (pseudo-)spin model, with Ising order-disorder operators
behind the transition. Still, our formalism is general and can be applied in a
much broader context.

10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics