Evolution of ground-state wave function in CeCoIn5 upon Cd or Sn doping
Evolution of ground-state wave function in CeCoIn5 upon Cd or Sn doping
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DOI：
10.1103/physrevb.97.045134
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发表时间：
2018-01-17
影响因子：
3.7
通讯作者：
Severing, A.
中科院分区：
文献类型：
--
作者：
Chen, K.;Strigari, F.;Severing, A.
我们给出了Cd和Sn掺杂CeCoIn(5)的Ce M-4，M-5边的线性偏振相关软X射线吸收光谱数据。确定了它们的超导、反铁磁和顺磁基态的(4)f基态波函数。CECO(In_(1-x)Cd-x)(5)的波函数没有变化，表明4f-传导-电子(Cf)杂化不受Cd掺杂的影响，从而支持对形成长程磁序的磁滴的解释。这与锡取代引起的波函数的变化形成了对比。在CeCO(In_(1-y)Sn-y)(5)中增加锡使4f轨道压缩到这些材料的四方平面内，这意味着增强了与In(1)原子的cf杂化，电子结构发生了均匀的变化。这些实验表明，4f波函数是一个非常灵敏的探针，可以检测4f和传导电子杂化过程中的微小变化，甚至可以传达与方向相关的信息。
We present linear polarization-dependent soft-x-ray absorption spectroscopy data at the Ce M-4,M-5 edges of Cd- and Sn-dopedCeCoIn(5). The(4)f ground-state wave functions have been determined for their superconducting, anti-ferromagnetic, and paramagnetic ground states. The absence of changes in the wave functions in CeCo(In1-x Cd-x)(5) suggests that the 4f-conduction-electron (cf) hybridization is not affected by global Cd doping, thus supporting the interpretation of magnetic droplets nucleating long-range magnetic order. This is contrasted by changes in the wave function due to Sn substitution. Increasing Sn in CeCo(In1-y Sn-y)(5) compresses the 4f orbitals into the tetragonal plane of these materials, suggesting enhanced cf hybridization with the in-plane In(1) atoms and a homogeneous altering of the electronic structure. As these experiments show, the 4f wave functions are a very sensitive probe of small changes in the hybridization of 4f and conduction electrons, even conveying information about direction dependencies.