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Effects of Ru Substitution on Dimensionality and Electron Correlations in Ba(Fe_{1-x}Ru_x)_2As_2

We report a systematic angle-resolved photoemission spectroscopy study on Ba(Fe$_{1-x}$Ru$_x$)$_2$As$_2$ for a wide range of Ru concentrations (0.15 $\leq$ \emph{x} $\leq$ 0.74). We observed a crossover from two-dimension to three-dimension for some of the hole-like Fermi surfaces with Ru substitution and a large reduction in the mass renormalization close to optimal doping. These results suggest that isovalent Ru substitution has remarkable effects on the low-energy electron excitations, which are important for the evolution of superconductivity and antiferromagnetism in this system.

preprint2012arXivOpen access
N. XuT. QianP. RichardY. -B. ShiX. -P. WangP. ZhangY. -B. HuangY. -M. XuH. MiaoG. XuG. -F. XuanW. -H. JiaoZ. -A. XuG. -H. CaoH. Ding
cond-mat.supr-concond-mat.str-el
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Open access15 authors2 topics
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N. XuT. QianP. RichardY. -B. ShiX. -P. WangP. ZhangY. -B. HuangY. -M. XuH. MiaoG. XuG. -F. XuanW. -H. JiaoZ. -A. XuG. -H. CaoH. Ding

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