42 citations · 104 across the 7 of their papers we have counts for
7 papers
Emergence of quadrupolar order under magnetic field in double perovskites
Stashu Kozlowski, Derek Churchill, Hae-Young Kee
Motivated by the time-reversal symmetry breaking signal in muon spin relaxation below a transition temperature without accompanying noticeable magnetic Bragg peaks in Os dou…
Microscopic Roadmap to a Yao-Lee Spin-Orbital Liquid
Derek Churchill, Emily Z. Zhang, Hae-Young Kee
The exactly solvable spin-1/2 Kitaev model on a honeycomb lattice has drawn significant interest, as it offers a pathway to realizing the long-sought after quantum spin liquid. Bui…
Transforming from Kitaev to Disguised Ising Chain: Application to CoNbO
Derek Churchill, Hae-Young Kee
For many years, CoNbO has served as an exemplar of the one-dimensional Ising model. However, recent experimental and theoretical analyses challenge its applicability to thi…
Field-induced Kitaev multipolar liquid in spin-orbit coupled 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 liqui…
Theoretical analysis of single-ion anisotropy in Mott insulators
Xiaoyu Liu, Derek Churchill, Hae-Young Kee
An effective spin model for Mott insulators is determined by the symmetries involved among magnetic sites, electron fillings, and their interactions. Such a spin Hamiltonian offers…
Competing multipolar orders in a face-centered cubic lattice: Application to the osmium double perovskites
Derek Churchill, Hae-Young Kee
In 5 Mott insulators with strong spin-orbit coupling, the lowest pseudospin states form a non-Kramers doublet, which carries quadrupolar and octupolar moments. A family of dou…
Exchange interactions, Jahn-Teller coupling, and multipole orders in pseudospin one-half Mott insulators
Giniyat Khaliullin, Derek Churchill, P. Peter Stavropoulos +1
We develop a microscopic theory of multipole interactions and orderings in 5 transition metal ion compounds. In a cubic environment, the ground state of 5 ions is a non-K…