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Localized <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>f</mml:mi></mml:math> -electron magnetism in the semimetal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ce</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Bi</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi>Au</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>
Cerium-based compounds crystallizing in the cubic Ce${}_{3}{X}_{4}\phantom{\rule{0}{0ex}}{T}_{3}$ ($X$=Bi, Sb and $T$=transition metal) structure present a wide variety of semiconducting ground states ranging from a conventional band gap in Ce${}_{3}$Sb${}_{4}$Au${}_{3}$ to prototypical Kondo insulating behavior in Ce${}_{3}$Bi${}_{4}$Pt${}_{3}$. The variation in physical properties among members stems from the delicate interplay between the …