Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling   Recent theoretical studies of topologically nontrivial electronic states in
Kondo insulators have pointed to the importance of spin-orbit coupling (SOC)
for stabilizing these states. However, systematic experimental studies that
tune the SOC parameter $\lambda_{\rm{SOC}}$ in Kondo insulators remain elusive.
The main reason is that variations of (chemical) pressure or doping strongly
influence the Kondo coupling $J_{\text{K}}$ and the chemical potential $\mu$ --
both essential parameters determining the ground state of the material -- and
thus possible $\lambda_{\rm{SOC}}$ tuning effects have remained unnoticed. Here
we present the successful growth of the substitution series
Ce$_3$Bi$_4$(Pt$_{1-x}$Pd$_x$)$_3$ ($0 \le x \le 1$) of the archetypal
(noncentrosymmetric) Kondo insulator Ce$_3$Bi$_4$Pt$_3$. The Pt-Pd substitution
is isostructural, isoelectronic, and isosize, and therefore likely to leave
$J_{\text{K}}$ and $\mu$ essentially unchanged. By contrast, the large mass
difference between the $5d$ element Pt and the $4d$ element Pd leads to a large
difference in $\lambda_{\rm{SOC}}$, which thus is the dominating tuning
parameter in the series. Surprisingly, with increasing $x$ (decreasing
$\lambda_{\rm{SOC}}$), we observe a Kondo insulator to semimetal transition,
demonstrating an unprecedented drastic influence of the SOC. The fully
substituted end compound Ce$_3$Bi$_4$Pd$_3$ shows thermodynamic signatures of a
recently predicted Weyl-Kondo semimetal.

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The categories of this paper are: econ
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
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: patt-sol
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The categories of this paper are: math-ph
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: math
37
The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph