88 citations · 281 across the 10 of their papers we have counts for
10 papers
Chiral Damping-Induced Chirality Switching and Control of Domain Walls in Antiferromagnets
Collins Ashu Akosa, Mu-Kun Lee, Aurélien Manchon +1
We investigate the impact of chiral damping (CD) on current-driven domain-wall (DW) dynamics in antiferromagnets (AFMs). Asymmetric CD between sublattices generates off-diagonal co…
Pseudo Electric Field and Pumping Valley Current in Graphene Nano-bubbles
Naif Hadadi, Adel Belayadi, Ahmed AlRabiah +6
The extremely high pseudo-magnetic field emerging in strained graphene suggests that an oscillating nano-deformation will induce a very high current even without electric bias. In…
Pair emission from a relativistic domain wall in antiferromagnets
Gen Tatara, Collins Ashu Akosa, Rubén M. Otxoa de Zuazola
Magnon emission and excitation by a relativistic domain wall at a constant velocity in antiferromagnet is theoretically studied. A pair emission due to a quadratic magnon coupling…
Topological Hall signatures of magnetic hopfions
Börge Göbel, Collins Ashu Akosa, Gen Tatara +1
Magnetic hopfions are topologically protected three-dimensional solitons that are constituted by a tube which exhibits a topologically nontrivial spin texture in the cross-section…
Tuning skyrmion Hall effect via engineering of spin-orbit interaction
C. A. Akosa, H. Li, G. Tatara +1
We demonstrate that the Magnus force acting on magnetic skyrmions can be efficiently tuned via modulation of the spin-orbit interaction strength. We show that the skyrmion Hall eff…
Current-driven nucleation and propagation of antiferromagnetic skyrmionium
S. A. Obadero, Y. Yamane, C. A. Akosa +1
We present a theoretical study on nucleation and propagation of antiferromagnetic skyrmionium induced by spin current injection. A skyrmionium, also known as 2π skyrmion, is a vort…
Theory of chiral effects in magnetic textures with spin-orbit coupling
C. A. Akosa, A. Takeuchi, Z. Yuan +1
We present a theoretical study of two-dimensional spatially and temporally varying magnetic textures in the presence of spin-orbit coupling (SOC) of both the Rashba and Dresselhaus…
Intrinsic non-adiabatic topological torque in magnetic skyrmions and vortices
Collins Ashu Akosa, Papa Birame Ndiaye, Aurélien Manchon
We propose that topological spin currents flowing in topologically non-trivial magnetic textures, such as magnetic skyrmions and vortices, produce an intrinsic non-adiabatic torque…
Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect
André Bisig, Collins Ashu Akosa, Jung-Hwan Moon +15
We present a combined theoretical and experimental study, investigating the origin of the enhanced non-adiabaticity of magnetic vortex cores. Scanning transmission X-ray microscopy…
Dirac Spin-Orbit Torques at the Surface of Topological Insulators
P. B. Ndiaye, C. A. Akosa, M. H. Fischer +3
We address the nature of spin-orbit torques at the magnetic surfaces of topological insulators, using both Kubo formula and Keldysh formalism. Through the analysis of the derived s…