51 citations · 240 across the 21 of their papers we have counts for
22 papers
Three-Dimensional Shankar Skyrmions in Frustrated Antiferromagnets
Vladyslav M. Kuchkin, Ricardo Rama-Eiroa, Carlos Saji +2
We formulate a continuum theory for three-dimensional (3D) Shankar skyrmions in frustrated chiral antiferromagnets (AFs) and derive the conditions for metastable finite-size $π_3(S…
A Topological Magnonic Black-White Hole Crystal
D. Galvez-Poblete, R. M. Otxoa, A. S. Nunez +1
The low-energy dynamics of antiferromagnetic spin waves map onto a massive Klein-Gordon scalar field, providing a solid-state platform for analogue-horizon physics. We show that an…
Moving Analogue Horizons in Stationary Ferroelectrics
David Galvez-Poblete, Rubén M. Otxoa, Alvaro S. Nunez +1
We show that a traveling modulation of the polarization-gradient stiffness in a ferroelectric material induces an effective flow in its collective polarization dynamics. Within a c…
Magnetic topological textures in nonorientable surfaces
Carlos Saji, Mario A. Castro, Vagson L. Carvalho-Santos +3
Topological magnetic textures confined to two-dimensional (2D) non-orientable manifolds exhibit behaviors absent in planar systems. We investigate bimerons on Möbius surfaces and s…
Magnetic Worms: Oscillatory Bimeron Pairing And Collective Transport In Patterned Stripes
Jose Toledo-Marin, Mario Castro, David Galvez-Poblete +4
Magnetic bimerons in a domain wall provide a practical route for current driven transport in patterned magnetic stripes. However, coupling between bimerons and pinning by defects c…
Electric-Field Control of Josephson Oscillations in Dipolar Bose-Einstein Condensates
David Galvez-Poblete, Roberto E. Troncoso, Guillermo Romero +2
We study the dynamic behavior of a Bose-Einstein condensate (BEC) with dipolar interactions when the influence of external electric fields affects the coherent tunneling properties…
Antiferron Modes in Ferroelectric Materials
David Galvez-Poblete, Mario A. Castro, Roberto E. Troncoso +3
We introduce the concept of antiferron modes in ferroelectric materials as dynamically stabilized collective excitations over inverted polarization states that decrease the system…
Static and Dynamics of Twisted Skyrmion Tubes in Frustrated Magnets
Carlos Saji, Eduardo Saavedra, Vagson L. Carvalho-Santos +2
Stable three-dimensional topological skyrmion structures in frustrated magnets are investigated. The texture exhibits a helicoid pattern along the vertical direction, described by…
Electrical Control of the Exchange Bias Effect at Model Ferromagnet-Altermagnet Junctions
Gaspar De la Barrera, Alvaro S. Nunez
This work analyzes the behavior of the interface between a ferromagnetic material and an alter-magnet. We use a well-established line of arguments based on electronic mean-field ca…
Elementary theory of Magnetoferrons: bringing magnons and ferrons together in multiferroic systems
Mario Castro, Carlos Saji, Guidobeth Saez +3
The collective excitations of a multiferroic material are analyzed. We show that these excitations also exhibit magnetoelectric behavior, leading to the hybridization of magnons ,o…
Quantized Toroidal Waves on Ferrotoroidal Magnets
Maximiliano Bernal, Guidobeth Saez, Tomás P. Espinoza +2
Magnetic-ferroic ordering and magnetic-toroidal moments are essential concepts in molecular electronics and magnetics. The magnetic toroidal moment is critical in understanding new…
Magnonics along the wall in Bimeron Chain Domain Walls
Carlos Saji, Eduardo Saavedra, Roberto E. Troncoso +3
We demonstrate that domain walls built from bimeron chains (bc-DW) in two-dimensional systems constitute a spontaneously assembled medium that holds magnonic excitations along its…
Topological magnonic dislocations modes
Carlos Saji, Nicolas Vidal-Silva, Alvaro S. Nunez +1
Spin fluctuations in two-dimensional (2D) ferromagnets in the presence of crystalline lattice dislocations are investigated. We show the existence of topologically protected non-pr…
Chiral spin-transfer torque induced by curvature gradient
G. H. R. Bittencourt, M. Castro, A. S. Nunez +3
This work analyzes the propagation of a transverse domain wall (DW) motion under the action of an electric current along a nanowire (NW) with a curvature gradient. Our results evid…
Magnonic Hall Effect and Magnonic Holography of Hopfions
Carlos Saji, Roberto E. Troncoso, Vagson L. Carvalho-Santos +2
Hopfions are localized and topologically non-trivial magnetic configurations that have received considerable attention in recent years. Through a micromagnetic approach, we analyze…
Theory of magnetism in the van der Waals magnet CrI3
Rodrigo Jaeschke-Ubiergo, Eric Suarez Morell, Alvaro Sebastian Nunez
We study the microscopical origin of anisotropic ferromagnetism in the van der Waals magnet CrI3. We conclude that the nearest neighbors exchange is well described by the Heisenber…
Magnetization ground state and reversal modes of magnetic nanotori
Smiljan Vojkovic, Álvaro S. Núñez, Dora Altbir +1
In this work, and by means of micromagnetic simulations, we study the magnetic properties of toroidal nanomagnets. The magnetization ground state for different values of the aspect…
Soliton-like magnetization textures in non-collinear antiferromagnets
Camilo Ulloa, A. S. Nunez
We show that proper control of magnetization textures can be achieved in noncollinear antiferromagnets. This opens the versatile toolbox of domain-wall manipulation in the context…
Antiferromagnetic Magnonic Crystals
Roberto E. Troncoso, Camilo Ulloa, Felipe Pesce +1
We describe the features of magnonic crystals based upon antiferromagnetic elements. Our main results are that with a periodic modulation of either magnetic fields or system charac…
Quantum fluctuations stabilize Skyrmion textures
A. Roldán-Molina, M. J. Santander, Á. S. Núñez +1
Here we show that the zero point energy associated to the quantum spin fluctuations of a non- collinear spin texture produce Casimir-like magnetic fields. We study the effect of th…
Quantum theory of spin waves in finite chiral spin chains
A. Roldán-Molina, M. J. Santander, Á. S. Núñez +1
We calculate the effect of spin waves on the properties of finite size spin chains with a chiral spin ground state observed on bi-atomic Fe chains deposited on Iridium(001). The sy…
Josephson Effects in a Bose-Einstein Condensate of Magnons
Roberto E. Troncoso, Álvaro S. Núñez
A phenomenological theory is developed, that accounts for the collective dynamics of a Bose-Einstein condensate of magnons. In terms of such description we discuss the nature of sp…