Mott versus Slater-type metal-insulator transition in Mn-substituted Sr3Ru2O7
| Autor: | Bernhard Keimer, Yi-De Chuang, A. G. Cruz Gonzalez, Roland Mathieu, Yoshiyuki Yoshida, Andrea Damascelli, Zhiwei Hu, Huan Lin, George A. Sawatzky, M. A. Hossain, Liu Hao Tjeng, C. T. Chen, Ilya Elfimov, Maurits W. Haverkort, B. Bohnenbuck, Arata Tanaka, Y. Tokura, Zahid Hussain |
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| Rok vydání: | 2012 |
| Předmět: |
Physics
X-ray absorption spectroscopy Condensed matter physics Scattering Magnetic order Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Electronic Optical and Magnetic Materials Impurity 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 010306 general physics |
| Zdroj: | Physical Review B. 86 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.86.041102 |
| Popis: | We present a temperature-dependent x-ray-absorption (XAS) and resonant elastic x-ray scattering (REXS) study of the metal-insulator transition (MIT) in Sr${}_{3}$(Ru${}_{1\ensuremath{-}x}$Mn${}_{x}$)${}_{2}$O${}_{7}$. The XAS results reveal that the MIT drives the onset of local antiferromagnetic correlations around the Mn impurities, a precursor of the long-range antiferromagnetism detected by REXS at ${T}_{\mathrm{order}}l{T}_{\mathrm{MIT}}$. This establishes that the MIT is of the Mott type (electronic correlations) as opposed to Slater type (magnetic order). While this behavior is induced by Mn impurities, the $(\frac{1}{4},\frac{1}{4},0)$ order exists for a wide range of Mn concentrations, and points to an inherent instability of Sr${}_{3}$Ru${}_{2}$O${}_{7}$. |
| Databáze: | OpenAIRE |
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