265 citations · 603 across the 13 of their papers we have counts for
13 papers
Revisiting magnon bound states: ferro-antiferromagnetic square-lattice model
Cesar A. Gallegos, A. L. Chernyshev
A comprehensive analysis of pairing and bound states of magnons in the Heisenberg square-lattice ferro-antiferromagnetic model is presented. We highlight…
Dynamics and thermodynamics of the S = 5/2 almost Heisenberg triangular lattice antiferromagnet K2Mn(SeO3)2
Mengze Zhu, V. Romerio, D. Moser +7
We report calorimetric, magnetic, and neutron scattering studies on an S = 5/2, nearly Heisenberg triangular-lattice antiferromagnet K2Mn(SeO3)2 with weak XXZ easy-axis anisotropy.…
Demystifying quantum escapism on the honeycomb lattice
A. L. Chernyshev
We demonstrate the versatility, simplicity, and power of the minimally-augmented spin-wave theory in studying phase diagrams of the quantum spin models in which unexpected magnetic…
BaCo(AsO): Strong Kitaev, After All
Pavel A. Maksimov, Shengtao Jiang, L. P. Regnault +1
The inelastic neutron scattering results and their analysis unequivocally point to a dominant Kitaev interaction in the honeycomb-lattice cobaltate BaCo(AsO). Our aniso…
Spontaneous magnon decays from nonrelativistic time-reversal symmetry breaking in altermagnets
Rintaro Eto, Matthias Gohlke, Jairo Sinova +3
Quasiparticles are central to condensed matter physics, but their stability can be undermined by quantum many-body interactions. Magnons, quasiparticles in quantum magnets, are par…
The Saga of -RuCl: Parameters, Models, and Phase Diagrams
Marius Möller, P. A. Maksimov, Shengtao Jiang +3
RuCl was likely the first ever deliberately synthesized ruthenium compound, following the discovery of the Ru element in 1844. For a long time it was known as an oxidati…
Magnon interactions in the quantum paramagnetic phase of CoNbO
Cesar A. Gallegos, A. L. Chernyshev
In this work, we study effects of magnon interactions in the excitation spectrum of CoNbO in the quantum paramagnetic phase in transverse field, where the spin-wave t…
Stripe magnetic order and field-induced quantum criticality in the perfect triangular-lattice antiferromagnet CsCeSe
Tao Xie, Nan Zhao, S. Gozel +13
The two-dimensional triangular-lattice antiferromagnet (TLAF) is a textbook example of frustrated magnetic systems. Despite its simplicity, the TLAF model exhibits a highly rich an…
Roller-Coaster in a Flatland: Magnetoresistivity in Eu-intercalated Graphite
A. L. Chernyshev, O. A. Starykh
Novel phenomena in magnetically-intercalated graphite has been a subject of much research, pioneered and promoted by M.~S. and G.~Dresselhaus and many others in the 1980s. Among th…
Anisotropic-Exchange Magnets on a Triangular Lattice: Spin Waves, Accidental Degeneracies, and Dual Spin Liquids
P. A. Maksimov, Zhenyue Zhu, Steven R. White +1
We present an extensive overview of the phase diagram, spin-wave excitations, and finite-temperature transitions of the anisotropic-exchange magnets on an ideal nearest-neighbor tr…
Disorder-Induced Mimicry of a Spin Liquid in YbMgGaO
Zhenyue Zhu, P. A. Maksimov, Steven R. White +1
We suggest that a randomization of the pseudo-dipolar interaction in the spin-orbit-generated low-energy Hamiltonian of YbMgGaO due to an inhomogeneous charge environment from…
Damped Topological Magnons in the Kagomé-Lattice Ferromagnets
A. L. Chernyshev, P. A. Maksimov
We demonstrate that interactions can substantially undermine the free-particle description of magnons in ferromagnets on geometrically frustrated lattices. The anharmonic coupling,…
Spin pseudogap in Ni-doped SrCuO2
G. Simutis, S. Gvasaliya, M. Mansson +11
The S=1/2 spin chain material SrCuO2 doped with 1% S=1 Ni-impurities is studied by inelastic neutron scattering. At low temperatures, the spectrum shows a pseudogap Δ~ 8 meV, absen…