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Magnetic skyrmions are nanoscale spin textures that their thermal stability originates from the nontrivial topology in nature. Recently, a plethora of topological spin textures have been theoretically predicted or experimentally observed,…

Mesoscale and Nanoscale Physics · Physics 2024-04-08 Yu Li , Yuzhe Zang , Runze Chen , Christoforos Moutafis

High-resolution tunneling electron spin transport properties (longitudinal spin current (LSC) and spin transfer torque (STT) maps) of topologically distinct real-space magnetic skyrmionic textures are reported by employing a 3D-WKB combined…

Materials Science · Physics 2020-10-27 Krisztián Palotás , Levente Rózsa , Eszter Simon , László Szunyogh

Skyrmions in ultrathin ferromagnetic metal (FM)/heavy metal (HM) multilayer systems produced by conventional sputtering methods have recently generated huge interest due to their applications in the field of spintronics. The sandwich…

The properties of mobile impurities in quantum magnets are fundamental for our understanding of strongly correlated materials and may play a key role in the physics of high-temperature superconductivity. Hereby, the motion of hole-like…

Strongly Correlated Electrons · Physics 2021-10-25 K. K. Nielsen , M. A. Bastarrachea-Magnani , T. Pohl , G. M. Bruun

We present a novel approach to understanding the extraordinary diversity of magnetic skyrmion solutions. Our approach combines a new classification scheme with efficient analytical and numerical methods. We introduce the concept of chiral…

Symmetry breaking together with strong spin-orbit interaction give rise to many exciting phenomena within condensed matter physics. A recent example is the existence of chiral spin textures, which are observed in magnetic systems lacking…

Mesoscale and Nanoscale Physics · Physics 2017-09-26 Wanjun Jiang , Gong Chen , Kai Liu , Jiadong Zang , Suzanne G. E. te Velthuis , Axel Hoffmann

Skyrmions are nanometric spin whirls that can be stabilized in magnets lacking inversion symmetry. The properties of isolated skyrmions embedded in a ferromagnetic background have been intensively studied. We show that single skyrmions and…

Strongly Correlated Electrons · Physics 2017-10-02 Jan Müller , Jayaraman Rajeswari , Ping Huang , Yoshie Murooka , Henrik M. Rønnow , Fabrizio Carbone , Achim Rosch

A 3D tomographic reconstruction technique is described for inversion of a set of limited-angle high-resolution 2D visible light emission projections (extended in the vertical and toroidal directions) of global MHD eigenmodes in the H-1NF…

Plasma Physics · Physics 2014-08-29 S. R. Haskey , B. D. Blackwell , B. Seiwald , J. Howard

Solitonic magnetic excitations such as domain walls and, specifically, skyrmionics enable the possibility of compact, high density, ultrafast,all-electronic, low-energy devices, which is the basis for the emerging area of skyrmionics. The…

Structure and properties of two-dimensional spiral textures in helical ferromagnets have been studied. In these magnetic mediums have been predicted new types of periodical structures - spiral lattices.

Strongly Correlated Electrons · Physics 2013-01-03 A. B. Borisov , F. N. Rybakov

An analytical model previously developed to study the structure of the magnetic field for the TEXTOR-DED [S.S. Abdullaev et al. Phys. Plasmas, 6, 153 (1999)] is applied to the similar study of the Ergodic Divertor of Tore Supra tokamak [Ph.…

Plasma Physics · Physics 2008-05-13 S. S. Abdullaev , T. Van Rompuy , K. H. Finken , M. Lehnen , M. Jakubowski

We study the high frequency Hall conductivity in a two-dimensional (2D) model of conduction electrons coupled to a background magnetic skyrmion texture via an effective Hund's coupling term. For an ordered skyrmion crystal, a Kubo formula…

Mesoscale and Nanoscale Physics · Physics 2023-12-22 Sopheak Sorn , Luyi Yang , Arun Paramekanti

Fe3PO4O3 forms a non-centrosymmetric lattice structure (space group R3m) comprising triangular motifs of Fe^{3+} coupled by strong antiferromagnetic interactions (|\Theta_{CW}| > 900 K). Neutron diffraction from polycrystalline samples…

Strongly Correlated Electrons · Physics 2016-02-03 Kate A. Ross , Mitchell Bordelon , Greg Terho , James R. Neilson

We find periodic skyrmionic textures via conformal cartographic projections that map either an entire spherical parameter space or a hemisphere onto every regular polygon that provides regular tessellations of the plane. These textures…

Optics · Physics 2024-06-25 David Marco , Isael Herrera , Sophie Brasselet , Miguel A. Alonso

Recently proposed spintronic devices use magnetic skyrmions as bits of information. The reliable detection of those chiral magnetic objects is an indispensable requirement. Yet, the high mobility of magnetic skyrmions leads to their…

Mesoscale and Nanoscale Physics · Physics 2022-06-01 Tim Matthies , Alexander F. Schäffer , Thore Posske , Roland Wiesendanger , Elena Y. Vedmedenko

We systematically study emergent Kondo lattice models from magic-angle twisted bilayer graphene using the topological heavy fermion representation. At the commensurate fillings, we demonstrate a series of symmetric strongly correlated…

Strongly Correlated Electrons · Physics 2023-07-13 Yang-Zhi Chou , Sankar Das Sarma

Imaging of nanoscale magnetic textures within extended material systems is of critical importance both to fundamental research and technological applications. Whilst high resolution magnetic imaging of thin nanoscale samples is…

The emergent properties of materials are defined by the symmetries of their underlying atomic, spin and charge order. The explorations of symmetry breaking effects are therefore usually limited by the intrinsic properties of known, stable…

Magnetic materials can host skyrmions, which are topologically non-trivial spin textures. In chiral magnets with cubic lattice symmetry, all previously-observed skyrmion phases require thermal fluctuations to become thermodynamically stable…

Strongly Correlated Electrons · Physics 2021-04-06 A. Chacon , L. Heinen , M. Halder , A. Bauer , W. Simeth , S. Mühlbauer , H. Berger , M. Garst , A. Rosch , C. Pfleiderer

In this work we present a detailed analysis on the performance of X-ray magnetic circular dichroism photo-emission electron microscopy (XMCD-PEEM) as a tool for vector reconstruction of the magnetization. For this, we choose 360$^{\circ}$…

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