Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of Fermi Arcs in Weyl Semimetals through Surface Negative
  Refraction   One of the main features of Weyl semimetals is the existence of Fermi arc
surface states at their surface, which cannot be realized in pure
two-dimensional systems in the absence of many-body interactions. Due to the
gapless bulk of the semimetal, it is, however, challenging to observe clear
signatures from the Fermi arc surface states. Here, we propose to detect such
novel surface states via perfect negative refraction that occurs between two
adjacent open surfaces with properly orientated Fermi arcs. Specifically, this
phenomenon visibly manifests in non-local transport measurement, where the
negative refraction generates a return peak in the real-space conductance. This
provides a unique signature of the Fermi arc surface states. We discuss the
appearance of this peak both in inversion and time-reversal symmetric Weyl
semimetals, where the latter exhibits conductance oscillations due to multiple
negative refraction scattering events.

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The categories of this paper are: nlin
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The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
3
The categories of this paper are: physics
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The categories of this paper are: chao-dyn