138 citations · 1.9k across the 51 of their papers we have counts for
42 papers · 1 filter
Eclipsing Kitaev: off-diagonal exchange governs the correlated high-field phases of -LiIrO
Vikram Nagarajan, Ioannis Rousochatzakis, Yuanqi Lyu +9
We report a high-field thermodynamic study of the hyperhoneycomb Kitaev material -LiIrO, using magnetotropic susceptibility to resolve its low-temperature field-angle ph…
One-dimensional physics of the frustrated quantum magnet PHCC
Alexander A. Tsirlin, Oleg Janson, Ioannis Rousochatzakis
We report a comprehensive microscopic study of the frustrated quantum magnet PHCC, (CHN)CuCl, using density-functional band-structure calculations combined w…
Quintuplet condensation in the skyrmionic insulator Cu2OSeO3 at ultrahigh magnetic fields
T. Nomura, I. Rousochatzakis, O. Janson +6
We report ultrahigh magnetic field Faraday rotation results on the chiral helimagnet Cu2OSeO3, the first Mott insulator showing skyrmion lattice phases and a linear magnetoelectric…
Spin- Kitaev-Heisenberg model on the honeycomb lattice: A high-order treatment via the many-body coupled cluster method
Marios Georgiou, Ioannis Rousochatzakis, Damian J. J. Farnell +2
We study the spin- Kitaev-Heisenberg model on the honeycomb lattice for , and , by using the coupled cluster method (CCM) of microscopic quantum many-body th…
Geometric frustration and Dzyaloshinskii-Moriya interactions in a quantum star lattice hybrid copper sulfate
Hajime Ishikawa, Yuto Ishii, Takeshi Yajima +6
We study the magnetism of a layered, spin- organic-inorganic copper sulfate, which is a close realization of the star lattice antiferromagnet, one of the playgrounds of ge…
Complex orders and chirality in the classical Kitaev- model
P. Peter Stavropoulos, Yang Yang, Ioannis Rousochatzakis +1
It is well-recognized that the low-energy physics of many Kitaev materials is governed by two dominant energy scales, the Ising-like Kitaev coupling and the symmetric off-diago…
Frustration relief and reorientation transition in the kagome-like dolerophanite CuOSO
Amelia Panther, Alexander A. Tsirlin, Ioannis Rousochatzakis
We present a theoretical study of dolerophanite CuOSO, a layered kagome-like spin- magnetic insulator that can be described either as a system of chains couple…
Beyond Kitaev physics in strong spin-orbit coupled magnets
Ioannis Rousochatzakis, Natalia B. Perkins, Qiang Luo +1
We review the recent advances and current challenges in the field of strong spin-orbit coupled Kitaev materials, with a particular emphasis on the physics beyond the exactly-solvab…
Multi- magnetic phases from frustration and chiral interactions
Marios Georgiou, Ioannis Rousochatzakis, Joseph J. Betouras
We investigate the effect of Dzyaloshinskii-Moriya (DM) interactions in the planar pyrochlore (checkerboard) antiferromagnet, one of the paradigmatic models of spin frustration, an…
Magnetic Excitations and Interactions in the Kitaev Hyperhoneycomb Iridate -LiIrO
Thomas Halloran, Yishu Wang, Mengqun Li +8
We present a thorough experimental study of the three-dimensional hyperhoneycomb Kitaev magnet -LiIrO, using a combination of inelastic neutron scattering (INS), time-do…
Signatures of non-Loudon-Fleury Raman scattering in the Kitaev magnet -LiIrO
Yang Yang, Yiping Wang, Ioannis Rousochatzakis +4
We investigate the magnetic excitations of the hyperhoneycomb Kitaev magnet - by means of inelastic Raman scattering. The spectra exhibits a coexistence…
Non-Loudon-Fleury Raman scattering in spin-orbit coupled Mott insulators
Yang Yang, Mengqun Li, Ioannis Rousochatzakis +1
We revisit the theory of magnetic Raman scattering in Mott insulators with strong spin-orbit coupling, with a major focus on Kitaev materials. We show that Kitaev materials with bo…
Magnon-spinon dichotomy in the Kitaev hyperhoneycomb -LiIrO
Alejandro Ruiz, Nicholas P. Breznay, Mengqun Li +16
The family of edge-sharing tri-coordinated iridates and ruthenates has emerged in recent years as a major platform for Kitaev spin liquid physics, where spins fractionalize into em…
Quantum-classical crossover in the spin-1/2 Heisenberg-Kitaev kagome magnet
Yang Yang, Natalia B. Perkins, Fulya Koç +2
The spin-1/2 Heisenberg kagome antiferromagnet is one of the paradigmatic playgrounds for frustrated quantum magnetism, with an extensive number of competing resonating valence bon…
Reentrant incommensurate order and anomalous magnetic torque in the Kitaev magnet -
Mengqun Li, Ioannis Rousochatzakis, Natalia B. Perkins
We present a theoretical study of the response of - under external magnetic fields in the , and crystallographic planes. The results are b…
Unconventional magnetic field response of the hyperhoneycomb Kitaev magnet
Mengqun Li, Ioannis Rousochatzakis, Natalia B. Perkins
We present a unified description of the response of the hyperhoneycomb Kitaev magnet - to applied magnetic fields along the orthorhombic directions ${\b…
Collective spin dynamics of Z2 vortex crystals in triangular Kitaev-Heisenberg antiferromagnets
Mengqun Li, Natalia B. Perkins, Ioannis Rousochatzakis
We show that the mesoscopic incommensurate vortex crystals proposed for layered triangular anisotropic magnets can be most saliently identified by two distinctive si…
Quantum spin liquid at finite temperature: proximate dynamics and persistent typicality
I. Rousochatzakis, S. Kourtis, J. Knolle +2
Quantum spin liquids are long-range entangled states of matter with emergent gauge fields and fractionalized excitations. While candidate materials, such as the Kitaev honeycomb ru…
Magnetic structure and excitation spectrum of the hyperhoneycomb Kitaev magnet -LiIrO
Samuel Ducatman, Ioannis Rousochatzakis, Natalia B. Perkins
We present a theoretical study of the static and dynamical properties of the Kitaev magnet -LiIrO based on the minimal -- model. We argue that the incommensurat…
Magnetic field-induced evolution of intertwined orders in the Kitaev magnet -LiIrO
Ioannis Rousochatzakis, Natalia B. Perkins
Recent scattering experiments in the 3D Kitaev magnet -LiIrO have shown that a relatively weak magnetic field along the crystallographic -axis drives the system…
Quantum spin liquid in the semiclassical regime
Ioannis Rousochatzakis, Yuriy Sizyuk, Natalia B. Perkins
Quantum spin liquids have been at the forefront of correlated electron research ever since their original proposal in 1973, and the realization that they belong to the broader clas…
Microscopic theory of the nearest-neighbor valence bond sector of the spin-1/2 kagome antiferromagnet
Arnaud Ralko, Frédéric Mila, Ioannis Rousochatzakis
The spin-1/2 Heisenberg model on the kagome lattice, which is closely realized in layered Mott insulators such as ZnCu(OH)Cl, is one of the oldest and most enigmatic sp…
Frustrated spin chain physics near the Majumdar-Ghosh point in szenicsite Cu(MoO)(OH)
Stefan Lebernegg, Oleg Janson, Ioannis Rousochatzakis +3
In this joint experimental and theoretical work magnetic properties of the Cu mineral szenicsite Cu(MoO)(OH) are investigated. This compound features isolated tr…
Classical spin liquid instability driven by off-diagonal exchange in strong spin-orbit magnets
Ioannis Rousochatzakis, N. B. Perkins
We show that the off-diagonal exchange anisotropy drives Mott insulators with strong spin-orbit coupling to a classical spin liquid regime, characterized by an infinite number of g…