Shadowed triplet pairings in Hund's metals with spin-orbit coupling

Hund's coupling in multiorbital systems allows for the possibility of even-parity orbital-antisymmetric spin-triplet pairing, which can be stabilized by spin-orbit (SOC). While this pairing expressed orbital basis is uniform and spin-triplet, it appears band as a pseudospin-singlet, with momentum dependence determined SOC underlying triplet character remaining form interband active away from Fermi energy. Here, we examine role momentum-dependent generating nontrivial symmetries, well hidden nature associated interorbital dub "shadowed triplet". Applying concept to Sr$_{2}$RuO$_{4}$, first derive several forms $d$-wave factors microscopic model, subsequently show that range parameters, state $s+id_{xy}$ symmetry stabilized. Such distinct pure spin-singlet -triplet pairings due its unique pseudospin-energy locking. We discuss experimental probes differentiate shadowed conventional pseudospin-triplet -singlet pairings.