603 citations · 2.3k across the 58 of their papers we have counts for
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Nonlinear Topological Orbital Responses of Antiferromagnetic Skyrmions
Amir N. Zarezad, Arne Brataas, Alireza Qaiumzadeh
Antiferromagnetic skyrmions evade the skyrmion Hall effect, but compensation suppresses their conventional topological charge Hall signal. We predict a semiclassical nonlinear topo…
Majorana interface states in anisotropic and tilted Dirac and Weyl systems
Abraham Kaleb Plascencia Pérez Páez, Alireza Qaiumzadeh
Anisotropy and cone tilt change how Majorana states propagate along an interface and decay away from it. We derive a two-dimensional Majorana surface Hamiltonian from a fully gappe…
Thickness-dependent magnon spin transport in antiferromagnetic insulators: Crossover from quasi-three-dimensional to quasi-two-dimensional regimes
Mathias Åsan Myhre, Verena Brehm, Thomas Delvaux +2
Motivated by the recent observation of giant room-temperature magnon spin conductivity in an ultrathin ferromagnetic insulator [X.-Y. Wei et al., Nat. Mater. 21, 1352 (2022)], we i…
Theory of magnon hydrodynamics in collinear antiferromagnets
Vivianne Olguín-Arias, Alireza Qaiumzadeh, Roberto E. Troncoso
We investigate the transport of spin angular momentum and linear momentum carried by magnons in electrically insulating collinear antiferromagnets (AFs). Focusing on both transvers…
Phonon-enhanced optical spin-conductivity and spin-splitter effect in altermagnets
Erik Wegner Hodt, Alireza Qaiumzadeh, Jacob Linder
Collinear antiferromagnets with nonrelativistic spin-split bands and no net magnetization, called altermagnets, show interesting transport properties due to their unique band struc…
Magnon and photon blockade in a hybrid antiferromagnet-cavity quantum system
Vemund Falch, Arne Brataas, Alireza Qaiumzadeh
We investigate both magnon and photon blockade for an antiferromagnetic insulator coupled to a linearly polarized cavity mode. We focus on the cross-Kerr nonlinearity between the t…
Stability of chiral magnon condensates in collinear antiferromagnetic insulators
Therese Frostad, Anne Louise Kristoffersen, Verena Brehm +3
Quasiequilibrium magnon Bose-Einstein condensates in ferromagnetic insulators have been a field of great interest, while condensation in antiferromagnetic systems has not yet been…
Second-order correlation and squeezing of photons in cavities with ultrastrong magnon-photon interactions
Vemund Falch, Arne Brataas, Alireza Qaiumzadeh
We investigate the second-order photon correlation function in cavity-magnon systems, focusing on ferromagnetic and antiferromagnetic cavities within the ultrastrong coupling regim…
Intrinsic Spin Nernst Effect and Chiral Edge Modes in van der Waals Ferromagnetic Insulators: Dzyaloshinskii-Moriya vs. Kitaev Interactions
Verena Brehm, Paweł Sobieszczyk, Alireza Qaiumzadeh
The thermomagnetic Nernst effect and chiral edge states are key signatures of nontrivial topology and emerging Berry curvature in magnonic systems. Implementing atomistic spin simu…
AC conductivity and magnetic dichroism of two-dimensional antiferromagnetic Dirac semimetals
Reza Sepehrinia, Siavash Eskandari, Alireza Qaiumzadeh
We investigate the magneto-optical properties of two-dimensional nonsymmorphic Dirac semimetals in the presence of antiferromagnetic order. Using the Kubo formula, we calculate the…
Impact of spin torques and spin pumping phenomena on magnon-plasmon polaritons in antiferromagnetic insulator-semiconductor heterostructures
Vemund Falch, Jeroen Danon, Alireza Qaiumzadeh +1
We investigate the impact of spin torque and spin pumping on the surface magnon polariton dispersion in a antiferromagnetic insulator-semiconductor heterostructure. In the bilayer…
Topological charge and spin Hall effects due to skyrmions in canted antiferromagnets
A. N. Zarezad, A. Qaiumzadeh, J. Barnaś +1
The topological charge-Hall effect (TCHE) and the topological spin-Hall effect (TSHE), arising from ferromagnetic (FM) and antiferromagnetic (AFM) skyrmions, respectively; can be e…
Skyrmion-deriven topological spin and charge Hall effects in diffusive antiferromagnetic thin films
Amir N. Zarezad, Józef Barnaś, Anna Dyrdał +1
We investigate topological Hall effects in a metallic antiferromagnetic (AFM) thin film and/or at the interface of an AFM insulator-normal metal bilayer with a single skyrmion in t…
Anisotropy-assisted magnon condensation in ferromagnetic thin films
Therese Frostad, Philipp Pirro, Alexander A. Serga +3
We theoretically demonstrate that adding an easy-axis magnetic anisotropy facilitates magnon condensation in thin yttrium iron garnet (YIG) films. Dipolar interactions in a quasi-e…
Tunable topological magnon-polaron states and anomalous Hall phenomena in two-dimensional ferromagnetic insulators
Jostein N. Kløgetvedt, Alireza Qaiumzadeh
We study magnon-polaron hybrid states, mediated by Dzyaloshinskii-Moriya and magnetoelastic interactions, in a two-dimensional ferromagnetic insulator. The magnetic system consists…
Magnon-Plasmon Hybridization Mediated by Spin-Orbit Interaction in Magnetic Materials
Anna Dyrdał, Alireza Qaiumzadeh, Arne Brataas +1
We propose a mechanism for magnon-plasmon coupling and hybridization in ferromagnetic (FM) and antiferromagnetic (AFM) systems. The electric field associated with plasmon oscillati…
Bilinear planar Hall effect in topological insulators due to spin-momentum locking inhomogeneity
A. N. Zarezad, J. Barnaś, A. Qaiumzadeh +1
We study the effect of spin-momentum locking inhomogeneity on the planar Hall effect in topological insulators (TIs). Using the minimal model describing surface states of 3D TIs an…
Micromagnetic study of spin transport in easy-plane antiferromagnetic insulators
Verena Brehm, Olena Gomonay, Serban Lepadatu +4
Magnon eigenmodes in easy-plane antiferromagnetic insulators are linearly polarized and are not expected to carry any net spin angular momentum. Motivated by recent nonlocal spin t…
Unconventional thermoelectric transport in tilted Weyl semimetals
Thorvald M. Ballestad, Alberto Cortijo, María A. H. Vozmediano +1
We analyze the effect of the tilt on the transverse thermoelectric coefficient of Weyl semimetals in the \emph{conformal} limit, i.e., zero temperature and zero chemical potential.…
Nonequilibrium magnons from hot electrons in antiferromagnetic systems
Marion M. S. Barbeau, Mikhail Titov, Mikhail I. Katsnelson +1
We describe a \emph{nonthermal} magnon activation mechanism in antiferromagnetic (AFM) systems via locally equilibrated \emph{spin-unpolarized} hot electrons excited by an ultrafas…
Spin-transfer-assisted parametric pumping of magnons in yttrium iron garnet
Therese Frostad, Hans L. Skarsvåg, Alireza Qaiumzadeh +1
The combination of parametric pumping and spin-transfer torque is a powerful approach that enables high-level control over magnetic excitations in thin-film ferromagnets. The excit…
Light-induced Dzyaloshinskii-Moriya interactions in antiferromagnetic metals
Sander Ø. Hanslin, Alireza Qaiumzadeh
The Dzyaloshinskii-Moriya (DM) interaction plays an essential role in novel topological spintronics, and the ability to control this chiral interaction is of key importance. Develo…
Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3
Romain Lebrun, Andrew Ross, Olena Gomonay +7
Antiferromagnetic materials can host spin-waves with polarizations ranging from circular to linear depending on their magnetic anisotropies. Until now, only easy-axis anisotropy an…
Theory of Domain-Wall Magnetoresistance in Metallic Antiferromagnets
Jun-Hui Zheng, Arne Brataas, Mathias Kläui +1
We develop a theory to compute the domain-wall magnetoresistance (DWMR) in antiferromagnetic (AFM) metals with different spin structures. In the diffusive transport regime, the DWM…