标题： CeCoIn$_{5}$的自旋共振随磁场和La掺杂的变化 显示英文标题

标题： Evolution of the spin resonance of CeCoIn$_{5}$ as a function of magnetic field and La substitution

摘要： 我们报告了CeCoIn$_{5}$在磁场和镧掺杂下的自旋共振演化情况。 在两种情况下，共振峰位置向较低能量移动，线型变宽。 对于La掺杂，发现比值$\Omega_{res}/k_{B}T_{c}$随$x$的变化几乎保持恒定。 在磁场作用下，激发能的减少对于H// [1,$\bar{1}$,0] 和 [1,1,1] 是相似的，并且比$T_{c}(H)$的减少更快。 对于沿 [1,$\bar{1}$,0] 方向施加的磁场，发现的塞曼效应对应于基态磁矩。 显示英文摘要

摘要： We report the evolution of the spin resonance in CeCoIn$_{5}$ as a function of magnetic field and lanthanum substitution. In both cases, the resonance peak position shifts to lower energy and the lineshape broadens. For La doping, it is found that the ratio $\Omega_{res}/k_{B}T_{c}$ is almost constant as a function of $x$. Under magnetic field the decrease of the excitation energy is similar for H// [1,$\bar{1}$,0] and [1,1,1] and faster than the decrease of $T_{c}(H)$. The Zeeman effect found for the field applied along [1,$\bar{1}$,0] corresponds to the ground state magnetic moment.