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

Abstract

The interplay between multiple bands, sizable multi-band electronic correlations and strong spin-orbit coupling may conspire in selecting a rather unusual unconventional pairing symmetry in layered Sr${}_2$RuO${}_4$. 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 Sr${}_2$RuO${}_4$ 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.

8 pages, 4 figures

References in corpus (6)

• Spin freezing transition and non-Fermi-liquid self-energy in a 3-orbital model
• The coherence-incoherence crossover and the mass-renormalization puzzles in Sr2RuO4
• Strong spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4
• Hidden quasi one-dimensional superconductivity in Sr${}_2$RuO${}_4$
• The Fermi surface of Sr2RuO4: spin-orbit and anisotropic Coulomb interaction effects
• Scaling and Enhanced Symmetry at the Quantum Critical Point of the Sub-Ohmic Bose-Fermi Kondo Model

Cited by in corpus (3)

• An Improved Two-Particle Self-Consistent Approach
• Multipole-fluctuation pairing mechanism of $d_{x^2-y^2}+ig$ superconductivity in Sr${}_2$RuO${}_4$
• Electronic structure correspondence of singlet-triplet scale separation in strained Sr2RuO4