Effects of Disordered Ru Substitution in BaFe2As2: Possible Realization of Superdiffusion in Real Materials
Effects of Disordered Ru Substitution in BaFe2As2: Possible Realization of Superdiffusion in Real Materials
复制标题
DOI：
10.1103/physrevlett.110.037001
复制
发表时间：
2013-01-14
影响因子：
8.6
通讯作者：
Ku, Wei
中科院分区：
文献类型：
--
作者：
Wang, Limin;Berlijn, Tom;Ku, Wei
从第一原理理论出发，在Ru取代的BaFe2As2中发现了费米表面对杂质散射的意外不敏感，这为这种材料在高水平无序取代下的传输和超导性的不寻常弹性提供了自然的解释。这种鲁棒性源于相关的现场和现场间杂质散射的相干干涉，在精神上类似于一维超扩散的微观机制。我们的结果也证明了费米表面和载流子浓度的强取代依赖性，并为最近光电子能谱中的当前差异提供了解决方案。这些效应为高取代的远程磁序、轨道序和超导序的减少提供了一个自然的解释。
An unexpected insensitivity of the Fermi surface to impurity scattering is found in Ru substituted BaFe2As2 from first-principles theory, offering a natural explanation of the unusual resilience of transport and superconductivity to a high level of disordered substitution in this material. This robustness is shown to originate from a coherent interference of correlated on-site and intersite impurity scattering, similar in spirit to the microscopic mechanism of superdiffusion in one dimension. Our result also demonstrates a strong substitution dependence of the Fermi surface and carrier concentration and provides a resolution to current discrepancies in recent photoelectron spectroscopy. These effects offer a natural explanation of the diminishing long-range magnetic, orbital, and superconducting orders with high substitution.