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Transport properties in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi><mml:msub><mml:mi mathvariant="normal">Os</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Sb</mml:mi><mml:mn>12</mml:mn></mml:msub></mml:mrow></mml:math>: Possibility of the ground state being semiconducting
We have measured both magnetoresistance and Hall effect in $\mathrm{Ce}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}$ to clarify the large resistivity state ascribed to the Kondo insulating one and the origin of the phase transition near $0.9\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ reported in the specific-heat measurement. We found unusual temperature $(T)$ dependence both in the electrical resistivity $\ensuremath{\rho}\ensuremath{\sim}{T}^{\ensuremath{-}1∕2}$ and the …