Home > Publications database > Large positive correlation between the effective electron mass and the multipolar fluctuation in the heavy-fermion metal Ce1 − x La x B6 > print

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100 1 _ |a Jang, Dongjin
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245 _ _ |a Large positive correlation between the effective electron mass and the multipolar fluctuation in the heavy-fermion metal Ce1 − x La x B6
260 _ _ |a [London]
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520 _ _ |a For the last few decades, researchers have been intrigued by multipolar ordering phenomena and related quantum phasetransitions in heavy-fermion Kondo systems. However, a criticality induced by substitution level (x), temperature (T), or magneticfield (B) is poorly understood even in the prototypical material, Ce1−xLaxB6, despite a large collection of experimental results isavailable. In this work, we presentT–B,x–T, andx–Bphase diagrams of Ce1−xLaxB6(B|| [110]). These are completed by investigatingheat capacity, magnetocaloric effect (MCE), and elastic neutron scattering. A drastic increase of the Sommerfeld coefficientγ0,which is estimated from the heat capacity down to 0.05 K, is observed with increasingx. The preciseT–Bphase diagram including ahigh-entropy region is derived from the MCE analysis in which a knowledge beyond the equilibrium thermodynamics is involved.Finally, thex–Bphase diagram atT= 0, which supports the existence of a quantum critical point atx> 0.75, is obtained by the sameanalysis. A detailed interpretation of phase diagrams strongly indicates positive correlation between thefluctuating multipoles andthe effective electron mass.
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693 _ _ |a Forschungs-Neutronenquelle Heinz Maier-Leibnitz
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700 1 _ |a Portnichenko, Pavlo Y.
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700 1 _ |a Cameron, Alistair S.
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700 1 _ |a Friemel, Gerd
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700 1 _ |a Dukhnenko, Anatoliy V.
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700 1 _ |a Shitsevalova, Natalya Y.
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700 1 _ |a Filipov, Volodymyr B.
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700 1 _ |a Ivanov, Alexandre
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700 1 _ |a Inosov, Dmytro S.
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773 _ _ |a 10.1038/s41535-017-0068-x
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