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Sr2Ir1−XRhXO4(X<0.5): An Inhomogeneous JEff=1/2 Hubbard System, Shalinee Chikara, Daniel Haskel, Jae-Hoon Sim, Heung-Sik Kim, Cheng-Chien Chen, G. Fabbris, L. S. I. Veiga, N. M. Souza-Neto, Jsaminka Terzic, Kamal H. Butrouna, Gang Cao, Myung Joon Han, Michael Van Veenendaal
Sr2Ir1−XRhXO4(X<0.5): An Inhomogeneous JEff=1/2 Hubbard System, Shalinee Chikara, Daniel Haskel, Jae-Hoon Sim, Heung-Sik Kim, Cheng-Chien Chen, G. Fabbris, L. S. I. Veiga, N. M. Souza-Neto, Jsaminka Terzic, Kamal H. Butrouna, Gang Cao, Myung Joon Han, Michael Van Veenendaal
Physics and Astronomy Faculty Publications
In a combined experimental and theoretical study, we investigate the properties of Sr2Ir1−xRhxO4. From the branching ratios of the L-edge isotropic x-ray absorption spectra, we determine that the spin-orbit coupling is remarkably independent of x for both iridium and rhodium sites. DFT+U calculations show that the doping is close to isoelectronic and introduces impurity bands of predominantly rhodium character close to the lower Hubbard band. Overlap of these two bands leads to metallic behavior. Since the low-energy states for xjeff=1/2 character, we suggest that the electronic …