Evolution of interorbital superconductor to intraorbital spin-density wave in layered ruthenates
نویسندگان
چکیده
The ruthenate family of layered perovskites has been a topic intense interest with much work dedicated to understanding the superconducting state single layer, Sr$_2$RuO$_4$. Another longstanding puzzle is lack superconductivity in its sister compound, Sr$_3$Ru$_2$O$_7$, which constrains possible mechanisms Here we address microscopic mechanism that unifies and spin-density wave order this materials. Beginning from model Sr$_2$RuO$_4$ featuring intraband pseudospin-singlet originating interorbital spin-triplet pairing via Hund's spin-orbit couplings, addition bilayer coupling staggered rotations oxygen octahedra are investigated. We find alone enhances superconductivity, while destroy leaving paramagnetic metal. magnetic field then shifts van Hove singularities near Fermi level, allowing intraorbital SDW form bilayer. Our theory predicts Sr$_3$Ru$_2$O$_7$ without exhibits possibly higher transition temperature.
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ژورنال
عنوان ژورنال: Physical review research
سال: 2022
ISSN: ['2643-1564']
DOI: https://doi.org/10.1103/physrevresearch.4.023109