159 citations · 482 across the 11 of their papers we have counts for
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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…
Optical magnons with dominant bond-directional exchange interactions in a honeycomb lattice iridate -LiIrO
Sae Hwan Chun, P. Peter Stavropoulos, Hae-Young Kee +6
We have used resonant inelastic x-ray scattering to reveal optical magnons in a honeycomb lattice iridate -LiIrO. The spectrum in the energy region 20-25 meV exhibit…
Spontaneous Chiral-Spin Ordering in Spin-Orbit Coupled Honeycomb Magnets
Qiang Luo, P. Peter Stavropoulos, Jacob S. Gordon +1
Frustrated magnets with highly degenerate ground states are at the heart of hunting exotic states of matter. Recent studies in spin-orbit coupled honeycomb magnets have generated i…
Magnetic Anisotropy in Spin-3/2 with Heavy Ligand in Honeycomb Mott Insulators: Application to CrI
P. Peter Stavropoulos, Xiaoyu Liu, Hae-Young Kee
Ferromagnetism in the two-dimensional CrI has generated a lot of excitement, and it was recently proposed that the spin-orbit coupling (SOC) in Iodine may generate bond-depende…
Field-Driven Gapless Spin Liquid in the Spin-1 Kitaev Honeycomb Model
Ciarán Hickey, Christoph Berke, Panagiotis Peter Stavropoulos +2
Recent proposals for spin-1 Kitaev materials, such as honeycomb Ni oxides with heavy elements of Bi and Sb, have shown that these compounds naturally give rise to antiferromagnetic…
Characterizing spin-one Kitaev quantum spin liquids
Ilia Khait, P. Peter Stavropoulos, Hae-Young Kee +1
Material realizations of the bond-dependent Kitaev interactions with =1/2 local moments have vitalized the research in quantum spin liquids. Recently, it has been proposed that…
Compressive-strain induced enhancement of exchange interactions and short-range magnetic order in SrIrO investigated by Raman spectroscopy
A. Seo, P. P. Stavropoulos, H. -H. Kim +7
We have carried out Raman spectroscopy experiments to investigate two-magnon excitations in epitaxial thin films of the quasi-two-dimensional antiferromagnetic Mott insulator Sr$_2…
Microscopic mechanism for higher-spin Kitaev model
P. Peter Stavropoulos, D. Pereira, Hae-Young Kee
The spin S= Kitaev honeycomb model has attracted significant attention, since emerging candidate materials have provided a playground to test non-Abelian anyons. The K…
Counterroating incommensurate magnetic order and strong quantum fluctuations in the honeycomb layers of
A. Scheie, K. Ross, P. Peter Stavropoulos +7
We report the magnetic structure and electronic properties of the honeycomb antiferromagnet . We find magnetic order with moments along the axis for tempe…
Counter-rotating spiral order in three dimensional iridates: signature of hidden symmetry in Kitaev- model
Panagiotis Peter Stavropoulos, Andrei Catuneanu, Hae-Young Kee
The unconventional magnetic orderings found in Kitaev spin liquid candidates suggest frustration of spin interactions, and raise a possibility of nearby spin liquid phases. In part…
Pressure-tuning of bond-directional exchange interactions and magnetic frustration in hyperhoneycomb iridate -
L. S. I. Veiga, M. Etter, K. Glazyrin +14
We explore the response of Ir orbitals to pressure in -, a hyperhoneycomb iridate in proximity to a Kitaev quantum spin liquid (QSL) ground state. X-ray…