期刊
PHYSICAL REVIEW B
卷 96, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.184524
关键词
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资金
- Japan Society for the Promotion of Science (JSPS) [24540378, 15K05177, 16H10177]
- JASRI [0046]
- JSPS [17K05555]
- Grants-in-Aid for Scientific Research [17K05555, 16H04006, 16H01077, 15K05177, 15H05884, 15H05745] Funding Source: KAKEN
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.
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