Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermi surfaces in Kondo insulators   We report magnetic quantum oscillations measured using torque magnetisation
in the Kondo insulator YbB$_{12}$ and discuss the potential origin of the
underlying Fermi surface. Observed quantum oscillations as well as
complementary quantities such as a finite linear specific heat capacity in
YbB$_{12}$ exhibit similarities with the Kondo insulator SmB$_6$, yet also
crucial differences. Small heavy Fermi sections are observed in YbB$_{12}$ with
similarities to the neighbouring heavy fermion semimetallic Fermi surface, in
contrast to large light Fermi surface sections in SmB$_6$ which are more
similar to the conduction electron Fermi surface. A rich spectrum of
theoretical models is suggested to explain the origin across different Kondo
insulating families of a bulk Fermi surface potentially from novel itinerant
quasiparticles that couple to magnetic fields, yet do not couple to weak DC
electric fields.

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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol