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Ultrafast demagnetization induced by femtosecond laser pulses in thin metallic layers is caused by the outflow of spin-polarized hot electron currents describable by the superdiffusive transport model. These laser-generated spin currents…

Mesoscale and Nanoscale Physics · Physics 2023-05-24 Pavel Baláž , Maciej Zwierzycki , Francesco Cosco , Karel Carva , Pablo Maldonado , Peter M. Oppeneer

Light-spin coupling is an attractive phenomenon from the standpoints of fundamental physics and device applications, and has spurred rapid development recently. Whereas the current efforts are devoted to trivial magnetism, the interplay…

Materials Science · Physics 2024-11-13 Kaiying Dou , Wenhui Du , Zhonglin He , Ying Dai , Baibiao Huang , Yandong Ma

The dynamics of single laser-driven electrons and many particle systems with spin are investigated on the basis of a classical theory. We demonstrate that the spin forces can alter the electron dynamics in an ultra-relativistic laser field…

Plasma Physics · Physics 2014-06-17 Meng Wen , Heiko Bauke , Christoph H. Keitel

When electrons are driven through unconventional magnetic structures, such as skyrmions, they experience emergent electromagnetic fields that originate several Hall effects. Independently, ground state emergent magnetic fields can also lead…

Mesoscale and Nanoscale Physics · Physics 2016-12-23 Manuel dos Santos Dias , Juba Bouaziz , Mohammed Bouhassoune , Stefan Blügel , Samir Lounis

Laser-induced ultrafast demagnetization is a phenomenon of utmost interest and attracts significant attention because it enables potential applications in ultrafast optoelectronics and spintronics. As a spin-orbit coupling assisted magnetic…

Chiral molecules have the potential for creating new magnetic devices by locally manipulating the magnetic properties of metallic surfaces. When chiral polypeptides chemisorb onto ferromagnets they can induce magnetization locally by spin…

Chemical Physics · Physics 2023-06-30 Yael Kapon , Fabian Kammerbauer , Shira Yochelis , Mathias Klaui , Yossi Paltiel

Using a semiclassical Green's function formalism, we discover the emergence of chiral and topological orbital magnetism in two-dimensional chiral spin textures by explicitly finding the corrections to the orbital magnetization, proportional…

Materials Science · Physics 2017-06-20 Fabian R. Lux , Frank Freimuth , Stefan Blügel , Yuriy Mokrousov

Light beams, with their rich degrees of freedom, including polarization and phase, along with their flexible tunability, have emerged as an ideal tool for generating magnetic topological textures.However, how to precisely control the light…

Optics · Physics 2026-02-03 Qifan Zhang , Shirong Lin , Wu Zhang

We introduce a new mechanism for the propulsion and separation by chirality of small ferromagnetic particles suspended in a liquid. Under the action of a uniform d.c. magnetic field H and an a.c. electric field E isomers with opposite…

Soft Condensed Matter · Physics 2015-05-27 E. Kirkinis , A. V. Andreev , B. Spivak

Noncollinear chiral spin textures in ferromagnetic multilayers are at the forefront of recent research in nano-magnetism with the promise for fast and energy-efficient devices. The recently demonstrated possibilities to stabilize such…

A tens of Tesla quasi-static axial magnetic field can be produced in the interaction of a short intense laser beam carrying an Orbital Angular Momentum with an underdense plasma. Three-dimensional "Particle In Cell" simulations and…

Plasma Physics · Physics 2018-10-03 R. Nuter , Ph. Korneev , I. Thiele , V. Tikhonchuk

Chiral spin textures, such as spin spirals and skyrmions, are key to advancing spintronics by enabling ultrathin, energy-efficient memory, and high-density data storage and processing. However, their realization remains hindered by the…

Recent observations of topological spin textures brought spintronics one step closer to new magnetic memories. Nevertheless, the existence of Skyrmions, as well as their stabilization, require very specific intrinsic magnetic properties…

Mesoscale and Nanoscale Physics · Physics 2017-04-19 E. A. Stepanov , C. Dutreix , M. I. Katsnelson

Chiral functionalities exhibited by systems lacking any mirror symmetry encompass natural optical activity, magnetochiral effect, diagonal current-induced magnetization, chirality-selective spin-polarized current of charged electrons or…

Materials Science · Physics 2024-10-01 Sang-Wook Cheongand Fei-Ting Huang

We report on the observation of spontaneously drifting coupled spin and quadrupolar density waves in the ground state of laser driven Rubidium atoms. These laser-cooled atomic ensembles exhibit spontaneous magnetism via light mediated…

Quantum Physics · Physics 2024-02-28 G. Labeyrie , J. G. M. Walker , G. R. M. Robb , R. Kaiser , T. Ackemann

Photoinduced nonequilibrium spin structure is examined in the double-exchange model, in which itinerant electrons couple with localized spins through the ferromagnetic Hund coupling. In particular, we focus on the transient spin structure…

Strongly Correlated Electrons · Physics 2021-11-03 Atsushi Ono , Sumio Ishihara

We discuss a joint microscopic theory for the laser-induced magnetization dynamics and spin transport in magnetic heterostructures based on the $s$-$d$ interaction. Angular momentum transfer is mediated by scattering of itinerant $s$…

Mesoscale and Nanoscale Physics · Physics 2020-09-24 Maarten Beens , Rembert A. Duine , Bert Koopmans

We theoretically show that moderate interaction between electrons confined to move in a plane and localized magnetic moments leads to formation of a noncoplanar magnetic state. The state is similar to the skyrmion crystal recently observed…

Mesoscale and Nanoscale Physics · Physics 2015-03-19 D. Solenov , D. Mozyrsky , I. Martin

Laser-induced ultrafast demagnetization is an important phenomenon that probes arguably ultimate limits of the angular momentum dynamics in solid. Unfortunately, many aspects of the dynamics remain unclear except that the demagnetization…

Materials Science · Physics 2023-07-03 Kyuhwe Kang , Hiroki Omura , Oukjae Lee , Kyung-Jin Lee , Hyun-Woo Lee , Tomoyasu Taniyama , Gyung-Min Choi

Chiral magnetism, wherein there is a preferred sense of rotation of the magnetization, has become a key aspect for future spintronic applications. It determines the chiral nature of magnetic textures, such as skyrmions, domain walls or spin…