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000862081 1001_ $$00000-0003-3875-7802$$aJang, Dongjin$$b0$$eCorresponding author
000862081 245__ $$aLarge positive correlation between the effective electron mass and the multipolar fluctuation in the heavy-fermion metal Ce1 − x La x B6
000862081 260__ $$a[London]$$bNature Publishing Group$$c2017
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000862081 520__ $$aFor the last few decades, researchers have been intrigued by multipolar ordering phenomena and related quantum phasetransitions in heavy-fermion Kondo systems. However, a criticality induced by substitution level (x), temperature (T), or magneticfield (B) is poorly understood even in the prototypical material, Ce1−xLaxB6, despite a large collection of experimental results isavailable. In this work, we presentT–B,x–T, andx–Bphase diagrams of Ce1−xLaxB6(B|| [110]). These are completed by investigatingheat capacity, magnetocaloric effect (MCE), and elastic neutron scattering. A drastic increase of the Sommerfeld coefficientγ0,which is estimated from the heat capacity down to 0.05 K, is observed with increasingx. The preciseT–Bphase diagram including ahigh-entropy region is derived from the MCE analysis in which a knowledge beyond the equilibrium thermodynamics is involved.Finally, thex–Bphase diagram atT= 0, which supports the existence of a quantum critical point atx> 0.75, is obtained by the sameanalysis. A detailed interpretation of phase diagrams strongly indicates positive correlation between thefluctuating multipoles andthe effective electron mass.
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000862081 7001_ $$0P:(DE-HGF)0$$aPortnichenko, Pavlo Y.$$b1
000862081 7001_ $$0P:(DE-HGF)0$$aCameron, Alistair S.$$b2
000862081 7001_ $$0P:(DE-HGF)0$$aFriemel, Gerd$$b3
000862081 7001_ $$0P:(DE-HGF)0$$aDukhnenko, Anatoliy V.$$b4
000862081 7001_ $$0P:(DE-HGF)0$$aShitsevalova, Natalya Y.$$b5
000862081 7001_ $$0P:(DE-HGF)0$$aFilipov, Volodymyr B.$$b6
000862081 7001_ $$0P:(DE-Juel1)156579$$aSchneidewind, Astrid$$b7
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000862081 7001_ $$00000-0003-0639-2503$$aInosov, Dmytro S.$$b9
000862081 7001_ $$0P:(DE-HGF)0$$aBrando, Manuel$$b10
000862081 773__ $$0PERI:(DE-600)2882263-8$$a10.1038/s41535-017-0068-x$$gVol. 2, no. 1, p. 62$$n1$$p62$$tnpj quantum materials$$v2$$x2397-4648$$y2017
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