Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dirac Fermions and Possible Weak Antilocalization in LaCuSb$_{2}$   Layered heavy-metal square-lattice compounds have recently emerged as
potential Dirac fermion materials due to bonding within those sublattices. We
report quantum transport and spectroscopic data on the layered Sb
square-lattice material LaCuSb$_{2}$. Linearly dispersing band crossings,
necessary to generate Dirac fermions, are experimentally observed in the
electronic band structure observed using angle-resolved photoemission
spectroscopy (ARPES), along with a quasi-two-dimensional Fermi surface. Weak
antilocalization that arises from two-dimensional transport is observed in the
magnetoresistance, as well as regions of linear dependence, both of which are
indicative of topologically non-trivial effects. Measurements of the
Shubnikov-de Haas (SdH) quantum oscillations show low effective mass electrons
on the order of 0.065$m_{e}$, further confirming the presence of Dirac fermions
in this material.

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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
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The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc