Coincidence of magnetic and valence quantum critical points in CeRhIn5 under pressure

Article

关键词: HEAVY-FERMION COMPOUNDS;    SUPERCONDUCTIVITY;    SCATTERING;   

DOI  :  10.1103/PhysRevB.96.184524

来源: SCIE

【 摘 要 】

We present accurate electrical resistivity measurements along the two principle crystallographic axes of the pressure-induced heavy-fermion superconductor CeRhIn5 up to 5.63 GPa. For both directions, a valence crossover line is identified in the p-T plane and the extrapolation of this line to zero temperature coincides with the collapse of the magnetic ordering temperature. Furthermore, it is found that the p-T phase diagram of CeRhIn5 in the valence crossover region is very similar to that of CeCu2Si2. These results point to the essential role of Ce-4f electron delocalization in both destroying magnetic order and realizing superconductivity in CeRhIn5 under pressure.

【 授权许可】

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