Reentrant superconductivity driven by quantum tricritical fluctuations in URhGe: evidence from 59Co NMR in URh0.9Co0.1Ge
Reentrant superconductivity driven by quantum tricritical fluctuations in URhGe: evidence from 59Co NMR in URh0.9Co0.1Ge
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URhGe 中量子三临界涨落驱动的重入超导：来自 URh0.9Co0.1Ge 中 59Co NMR 的证据
DOI：
10.1103/physrevlett.114.216401
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. Kambe and S. Araki
中科院分区：
文献类型：
--
作者：
Y. Tokunaga;D. Aoki;H. Mayaffre;S. Kramer;M.-H. Julien;C. Berthier;M. Horvatic;H. Sakai;S. Kambe and S. Araki
我们对核磁共振自旋-自旋弛豫的测量揭示了在铁磁重费米子化合物URhGe中发生重入超导（RSC）的场诱导量子临界点附近电子自旋涨落的发散。我们绘制出自旋涨落的强度在（）平面的磁场分量，并表明，临界涨落发展在同一有限区域附近的fieldas，在那里观察到RSC。这强烈表明这些量子涨落是导致RSC的配对粘合剂。观察到的波动是一个三临界点的特点，其次是一个相位分岔量子临界端点。
Our measurements of theNMR spin-spin relaxation inreveal a divergence of electronic spin fluctuations in the vicinity of the field-induced quantum critical point at, around which reentrant superconductivity (RSC) occurs in the ferromagnetic heavy fermion compound URhGe. We map out the strength of spin fluctuations in the () plane of magnetic field components and show that critical fluctuations develop in the same limited region near the fieldas 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.