期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.216401
关键词
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资金
- Japan Society for the Promotion of Science (JSPS) KAKENHI Grant [26400375]
- European Research Council (ERC)
- International Collaboration Center of Institute for Material Research (ICC-IMR) of Tohoku University
- REIMEI Research Program of Japan Atomic Energy Agency (JAEA)
- Grants-in-Aid for Scientific Research [15H05884, 26400375, 15K05152, 25247055] Funding Source: KAKEN
Our measurements of the Co-59 NMR spin-spin relaxation in URh0.9Co0.1Ge reveal a divergence of electronic spin fluctuations in the vicinity of the field-induced quantum critical point at H-R approximate to 13 T, around which reentrant superconductivity (RSC) occurs in the ferromagnetic heavy fermion compound URhGe. We map out the strength of spin fluctuations in the (H-b; H-c) plane of magnetic field components and show that critical fluctuations develop in the same limited region near the field HR as that where RSC is observed. This strongly suggests these quantum fluctuations as the pairing glue responsible for the RSC. The fluctuations observed are characteristic of a tricritical point, followed by a phase bifurcation toward quantum critical end points.
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