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Journal Article

First-Principles Correlated Approach to the Normal State of Strontium Ruthenate


Laad,  Mukul S.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Acharya, S., Laad, M. S., Dey, D., Maitra, T., & Taraphder, A. (2017). First-Principles Correlated Approach to the Normal State of Strontium Ruthenate. Scientific Reports, 7: 43033. doi:10.1038/srep43033.

Cite as: https://hdl.handle.net/21.11116/0000-0001-2B2F-C
The interplay between multiple bands, sizable multi-band electronic correlations and strong spinorbit coupling may conspire in selecting a rather unusual unconventional pairing symmetry in layered Sr2RuO4. This mandates a detailed revisit of the normal state and, in particular, the T-dependent incoherence-coherence crossover. Using a modern first-principles correlated view, we study this issue in the actual structure of Sr2RuO4 and present a unified and quantitative description of a range of unusual physical responses in the normal state. Armed with these, we propose that a new and important element, that of dominant multi-orbital charge fluctuations in a Hund's metal, may be a primary pair glue for unconventional superconductivity. Thereby we establish a connection between the normal state responses and superconductivity in this system.