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

N. Xu; T. Qian; P. Richard; Y. -B. Shi; X. -P. Wang; P. Zhang; Y. -B. Huang; Y. -M. Xu; H. Miao; G. Xu; G. -F. Xuan; W. -H. Jiao; Z. -A. Xu; G. -H. Cao; H. Ding

doi:10.1103/physrevb.86.064505

arXiv · 1203.4699

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

N. Xu·T. Qian·P. Richard·Y. -B. Shi·X. -P. Wang·P. Zhang·Y. -B. Huang·Y. -M. Xu·H. Miao·G. Xu·G. -F. Xuan·W. -H. Jiao·Z. -A. Xu·G. -H. Cao·H. Ding

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Abstract

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.

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N. Xu, T. Qian, P. Richard, Y. -B. Shi, X. -P. Wang, P. Zhang, Y. -B. Huang, Y. -M. Xu, H. Miao, G. Xu, G. -F. Xuan, W. -H. Jiao, Z. -A. Xu, G. -H. Cao, H. Ding. 2012-03-21. Effects of Ru Substitution on Dimensionality and Electron Correlations in Ba(Fe_{1-x}Ru_x)_2As_2. https://doi.org/10.1103/physrevb.86.064505

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