Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral surface states on the step edge in a Weyl semimetal   A Weyl semimetal with a pair of Weyl nodes accommodates chiral states on its
flat surface if the Weyl nodes are projected onto two different points in the
corresponding surface Brillouin zone. These surface states are collectively
referred to as a Fermi arc as they appear to connect the projected Weyl nodes.
This statement assumes that translational symmetry is present on the surface
and hence electron momentum is a conserved quantity. It is unclear how chiral
surface states are modified if the translational symmetry is broken by a
particular system structure. Here, focusing on a straight step edge of finite
width, we numerically analyze how chiral surface states appear on it. It is
shown that the chiral surface states are algebraically (i.e., weakly) localized
near the step edge. It is also shown that the appearance of chiral surface
states is approximately determined by a simple condition characterized by the
number of unit atomic layers constituting the step edge together with the
location of the Weyl nodes.

23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
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The categories of this paper are: econ
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph