scholarly journals Complex spin texture of Dirac cones induced via spin-orbit proximity effect in graphene on metals

2018 ◽  
Vol 98 (7) ◽  
Author(s):  
Jagoda Sławińska ◽  
Jorge I. Cerdá
Keyword(s):  
Proximity Effect ◽  
Spin Orbit ◽  
Complex Spin ◽  
Spin Texture

scholarly journals Phase shift in skyrmion crystals

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Satoru Hayami ◽  
Tsuyoshi Okubo ◽  
Yukitoshi Motome
Keyword(s):  
Phase Shift ◽  
Relative Phase ◽  
Exchange Interactions ◽  
Thermal Fluctuations ◽  
Coupled Systems ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Density Waves ◽  
Vortex Crystal ◽  
Spin Texture

AbstractThe magnetic skyrmion crystal is a periodic array of a swirling topological spin texture. Since it is regarded as an interference pattern by multiple helical spin density waves, the texture changes with the relative phase shifts among the constituent waves. Although such a phase degree of freedom is relevant to not only magnetism but also transport properties, its effect has not been elucidated thus far. We here theoretically show that a phase shift in the skyrmion crystals leads to a tetra-axial vortex crystal and a meron-antimeron crystal, both of which show a staggered pattern of the scalar spin chirality and give rise to nonreciprocal transport phenomena without the spin-orbit coupling. We demonstrate that such a phase shift can be driven by exchange interactions between the localized spins, thermal fluctuations, and long-range chirality interactions in spin-charge coupled systems. Our results provide a further diversity of topological spin textures and open a new field of emergent electromagnetism by the phase shift engineering.

Modulated spin orbit torque in a Pt/Co/Pt/YIG multilayer by nonequilibrium proximity effect

2018 ◽  
Vol 112 (2) ◽  
pp. 022402 ◽  
Author(s):  
Q. B. Liu ◽  
K. K. Meng ◽  
Y. Z. Cai ◽  
X. H. Qian ◽  
Y. C. Wu ◽  
...  
Keyword(s):  
Proximity Effect ◽  
Spin Orbit

Melnikov-based analysis for chaotic dynamics of spin-orbit motion of a gyrostat satellite

2019 ◽  
Vol 233 (4) ◽  
pp. 931-941
Author(s):  
Seyed Mahdi Abtahi
Keyword(s):  
Equations Of Motion ◽  
Time History ◽  
Melnikov Method ◽  
Spin Orbit ◽  
Attitude Dynamics ◽  
Inertia Moment ◽  
Coupled Equations ◽  
Highly Nonlinear ◽  
Complex Spin ◽  
The Mathematical Model

Interactions of the orbital motion on attitude dynamics of the gyrostat satellite are considered in this paper. The mathematical model is derived using the Hamiltonian method for the spin-orbit motion of the spacecraft followed by the reduction of the coupled equations of motion using the extended Deprit canonical transformation. The analytical Melnikov method is used innovatively to study chaos on the complex Spin-Orbit dynamics of the gyrostat satellite. Also, the numerical methods such as Lyapunov exponent criterion, Poincaré section, trajectories of phase portrait, and the time–history responses can be proved the heteroclinic bifurcation and chaotic vibrations in the highly nonlinear system. Using the results based on the Melnikov integral, the parameters of the spacecraft including the mass and inertia moment of satellite with respect to the altitude of orbit can be designed in order to control the bifurcation with a view to prevention of chaos in the system in the absence of an active control system.

scholarly journals Complex Spin Texture in the Pure and Mn-Doped Topological InsulatorBi2Te3

2012 ◽  
Vol 108 (20) ◽  
Author(s):  
J. Henk ◽  
A. Ernst ◽  
S. V. Eremeev ◽  
E. V. Chulkov ◽  
I. V. Maznichenko ◽  
...  
Keyword(s):  
Complex Spin ◽  
Spin Texture ◽  
Mn Doped

scholarly journals Boosting proximity spin–orbit coupling in graphene/WSe2 heterostructures via hydrostatic pressure

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Bálint Fülöp ◽  
Albin Márffy ◽  
Simon Zihlmann ◽  
Martin Gmitra ◽  
Endre Tóvári ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Proximity Effect ◽  
Weak Localization ◽  
Interlayer Coupling ◽  
Proximity Effects ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Weak Antilocalization ◽  
Atomic Orbitals

AbstractVan der Waals heterostructures composed of multiple few layer crystals allow the engineering of novel materials with predefined properties. As an example, coupling graphene weakly to materials with large spin–orbit coupling (SOC) allows to engineer a sizeable SOC in graphene via proximity effects. The strength of the proximity effect depends on the overlap of the atomic orbitals, therefore, changing the interlayer distance via hydrostatic pressure can be utilized to enhance the interlayer coupling between the layers. In this work, we report measurements on a graphene/WSe2 heterostructure exposed to increasing hydrostatic pressure. A clear transition from weak localization to weak antilocalization is visible as the pressure increases, demonstrating the increase of induced SOC in graphene.

scholarly journals Proximity effect in a ferromagnetic semiconductor with spin-orbit interactions

2019 ◽  
Vol 100 (9) ◽  
Author(s):  
Taketoki Yamashita ◽  
Jaechul Lee ◽  
Tetsuro Habe ◽  
Yasuhiro Asano
Keyword(s):  
Proximity Effect ◽  
Ferromagnetic Semiconductor ◽  
Spin Orbit ◽  
Spin Orbit Interactions
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