论文标题
重铁杆超导体cerh $ _2 $ as $ _2 $的各向异性磁转移属性
Anisotropic magnetotransport properties of the heavy-fermion superconductor CeRh$_2$As$_2$
论文作者
论文摘要
我们报告了重力超级导体cerh $ _2 $的各向异性电阻率测量值为$ _2 $的磁场，最大为16吨，温度低至0.35 k。对于沿四方$ a $轴施加的磁场，$ t_0 $在16吨达到$ \ sim $ 1.75 k的磁场增强。此外，磁场引起的过渡发生在$ b_m \ sim \ sim $ 8.1 $ 8.1 t，对应于与新的破碎对称状态的变化相对应。对于沿$ c $轴施加的磁场，$ t_0 $在我们的基础温度$ \ sim $ 0.35 k左右抑制了$ b \ sim $ 4.5 t，这是一个接近先前报道的现场诱导的超导状态中的磁场，建议从偶数到奇怪的状态。我们的结果表明，CERH $ _2 $中的多个超导阶段$ _2 $与$ T_0 $的抑制型四极密度波相关。
We report anisotropic resistivity measurements of the heavy-fermion superconductor CeRh$_2$As$_2$ in magnetic fields up to 16 T and temperatures down to 0.35 K. The measured CeRh$_2$As$_2$ resistivity shows a signature corresponding to the suggested quadrupole density wave order state at $T_0 \sim$ 0.5 K for both measured directions. For a magnetic field applied along the tetragonal $a$ axis, $T_0$ is enhanced with magnetic field reaching $\sim$1.75 K at 16 T. Further, a magnetic field-induced transition occurs at $B_m \sim $ 8.1 T corresponding to a change to a new broken symmetry state. For a magnetic field applied along the $c$ axis, $T_0$ is suppressed below our base temperature $\sim$0.35 K by $B \sim$ 4.5 T, a field close to the previously reported field-induced transition within the superconducting state suggested to be from an even-parity to an odd-parity state. Our results indicate that the multiple superconducting phases in CeRh$_2$As$_2$ are intimately tied to the suppression of the proposed quadrupole-density-wave phase at $T_0$.
