Field-induced Kitaev multipolar liquid in spin-orbit coupled d2 honeycomb Mott insulators
Ahmed Rayyan, Derek Churchill, Hae‐Young Kee
The Kitaev model, characterized by bond-dependent Ising spin interactions among spin-orbit entangled dipole moments in Mott insulators, offered a new approach to quantum spin liquids. Motivated by another type of bond-dependent interaction among quadrupole moments in $5{d}^{2}$ Mott insulators, we provide a microscopic route to uncover the Kitaev multipolar liquid, featuring fractionalized excitations out of non-Kramers doublets carrying multipole moments. The key ingredient is the magnetic field that allows for bond-anisotropic quadrupole-octupole interactions via mixing with the excited triplet states. The conditions to realize signatures of this phase in real materials are also discussed.
arXiv:2206.10647•Physical review. B./Physical review. B•Jan 23, 2023•13 citations