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Fermi surface of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>LaRu</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">P</mml:mi><mml:mn>12</mml:mn></mml:msub></mml:mrow></mml:math>: A clue to the origin of the metal-insulator transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>PrRu</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="…
We report the de Haas--van Alphen (dHvA) effect and magnetoresistance in the filled-skutterudite superconductor ${\mathrm{LaRu}}_{4}{\mathrm{P}}_{12}$, which is a reference material of ${\mathrm{PrRu}}_{4}{\mathrm{P}}_{12}$ that exhibits a metal-insulator (M-I) transition at ${T}_{\mathrm{MI}}\ensuremath{\simeq}60\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. The observed dHvA branches for the main Fermi surface (FS) are well explained by the band-structure calculation, using the full …