Evolution of interorbital superconductor to intraorbital spin-density wave in layered ruthenates

Austin W. Lindquist; Jonathan Clepkens; Hae-Young Kee

doi:10.1103/PhysRevResearch.4.023109

← Back to search

Evolution of interorbital superconductor to intraorbital spin-density wave in layered ruthenates

Austin W. Lindquist, Jonathan Clepkens, Hae-Young Kee

DOI 10.1103/PhysRevResearch.4.023109 · Physical Review Research

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

The ruthenate family of layered perovskites has been a topic of intense interest, with much work dedicated to the superconducting state of Sr2RuO4. Another long-standing puzzle is the lack of superconductivity in its sister compound, Sr3Ru2O7, which constrains the possible mechanisms of Sr2RuO4. Here we address a microscopic mechanism that unifies the orders in these materials. Beginning from a model of Sr2RuO4 featuring interorbital spin-triplet pairing via Hund's and spin-orbit couplings, we find that bilayer coupling alone enhances, while staggered rotations destroy interorbital superconductivity. A magnetic field then shifts van Hove singularities, allowing intraorbital spin-density wave order to form in Sr3Ru2O7. Our theory predicts that Sr3Ru2O7 without staggered rotations exhibits interorbital superconductivity with a possibly higher transition temperature.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sr3Ru2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown