论文标题
结构性130-K相过渡和ht-ce $ _2 $ rh $ rh $ _2 $ ga的两个离子近代状态的出现，$^{69,71} $ ga ga ga nou nou nou nou nou nou nou nou nou nou nou nou nou nucu Quadrupole共振
Structural 130-K Phase Transition and Emergence of a Two-Ion Kondo State in HT-Ce$_2$Rh$_2$Ga Explored by $^{69,71}$Ga Nuclear Quadrupole Resonance
论文作者
论文摘要
我们已经研究了微观磁性特性，130-K相变的性质以及最近合成的化合物CE $ _2 $ RH $ _2 $ GA中的基态，并使用$^{69,71} $ ga ga ga nou nuco nuco nuco nuco nucu nou nucu nucu nuco nucu nuco nucu nucode Quadrupole rupole rupole resonance（nqr）。 NQR光谱清楚地显示出在$ t_t $ $ \ sim $ 130 K处的异常相转换，从而将高温单个NQR线分解为两条清晰解析的NQR线，提供了两个结晶性不相同的GA位点的证据。 NQR频率与频带结构的全面计算非常吻合。 Our NQR results indicate the absence of magnetic or charge order down to 0.3 K. The temperature dependence of the spin-lattice relaxation rate, 1/$T_1$, shows three distinct regimes, with onset temperatures at $T_t$ and 2 K. The temperature-independent 1/$T_1$, observed between $T_t$ and 2 K, crosses over to a Korringa process, 1/$T_1$ $\propto$ $ t $，低于$ \ sim $ 2 K，这证明了一种罕见的两离子围栏场景：该系统在两个不同的GA站点中进入2.0的密集近相干状态，而0.8 K。
We have studied the microscopic magnetic properties, the nature of the 130-K phase transition, and the ground state in the recently synthesized compound Ce$_2$Rh$_2$Ga by use of $^{69,71}$Ga nuclear quadrupole resonance (NQR). The NQR spectra clearly show an unusual phase transition at $T_t$ $\sim$ 130 K yielding a splitting of the high-temperature single NQR line into two clearly resolved NQR lines, providing evidence for two crystallographically inequivalent Ga sites. The NQR frequencies are in good agreement with fully-relativistic calculations of the band structure. Our NQR results indicate the absence of magnetic or charge order down to 0.3 K. The temperature dependence of the spin-lattice relaxation rate, 1/$T_1$, shows three distinct regimes, with onset temperatures at $T_t$ and 2 K. The temperature-independent 1/$T_1$, observed between $T_t$ and 2 K, crosses over to a Korringa process, 1/$T_1$ $\propto$ $T$, below $\sim$ 2 K, which evidences a rare two-ion Kondo scenario: the system goes into a dense Kondo coherent state at 2.0 and 0.8 K for the two different Ga sites.
