Results 61 to 70 of about 11,871 (158)

Josephson coupling across magnetic topological insulator MnBi2Te4

Communications Materials
Topological superconductors hosting Majorana zero modes are of great interest for both fundamental physics and potential quantum computing applications. In this work, we investigate the transport properties of the intrinsic magnetic topological insulator
Thies Jansen, Ekaterina Kochetkova, Anna Isaeva, Alexander Brinkman, Chuan Li   +4 more
doaj   +1 more source

Emergence of Large-Scale Magnetic-Vortices Structures by Small-Scale Helicity in Stratified Magnetized Plasma

East European Journal of Physics
In this paper, a new type of instability is identified, leading to the generation of vortex motions and magnetic fields in a plasma layer with a constant temperature gradient, subjected to uniform gravity and a vertical magnetic field.
Michael I. Kopp, Volodymyr V. Yanovsky
doaj   +1 more source

The Hidden Magnetic Structures of a Solar Intermediate Filament Revealed by the Injected Flare Material

The Astrophysical Journal
Solar filaments are spectacular objects in the solar atmosphere, consisting of accumulations of cool, dense, and partially ionized plasma suspended in the hot solar corona against gravity. The magnetic structures that support the filament material remain
Xiaoli Yan, Zhike Xue, Jincheng Wang, Liheng Yang, Kaifan Ji, Defang Kong, Zhe Xu, Qiaoling Li, Liping Yang, Xinsheng Zhang   +9 more
doaj   +1 more source

Bead-Based Hydrodynamic Simulations of Rigid Magnetic Micropropellers

Frontiers in Robotics and AI, 2018
The field of synthetic microswimmers, micro-robots moving in aqueous environments, has evolved significantly in the last years. Micro-robots actuated and steered by external magnetic fields are of particular interest because of the biocompatibility of ...
Agnese Codutti, Agnese Codutti, Felix Bachmann, Damien Faivre, Damien Faivre, Stefan Klumpp, Stefan Klumpp   +6 more
doaj   +1 more source

Quadratic helicities and the energy of magnetic fields [PDF]

Proceedings of the Steklov Institute of Mathematics, 2012
Two non-local asymptotic invariants of magnetic fields for the ideal magnetohydrodynamics are introduced. The velocity of variation of the invariants for a non-ideal magnetohydrodynamics with a small magnetic dissipation is estimated. By means of the invariants the spectra of electromagnetic fields are investigated.
openaire   +3 more sources

Quantum spin Hall effect in magnetic graphene

Nature Communications
A promising approach to attain long-distance coherent spin propagation is accessing topological spin-polarized edge states in graphene. Achieving this without external magnetic fields necessitates engineering graphene band structure, obtainable through ...
Talieh S. Ghiasi, Davit Petrosyan, Josep Ingla-Aynés, Tristan Bras, Kenji Watanabe, Takashi Taniguchi, Samuel Mañas-Valero, Eugenio Coronado, Klaus Zollner, Jaroslav Fabian, Philip Kim, Herre S. J. van der Zant   +11 more
doaj   +1 more source

Incommensurate magnetic order in an axion insulator candidate EuIn2As2 investigated by NMR measurement

npj Quantum Materials
Magnetic topological insulators exhibit unique electronic states due to the interplay between the electronic topology and the spin structure. The antiferromagnetic metal EuIn2As2 is a prominent candidate material in which exotic topological phases ...
Hikaru Takeda, Jian Yan, Zhongzhu Jiang, Xuan Luo, Yuping Sun, Minoru Yamashita   +5 more
doaj   +1 more source

Biotemplated flagellar nanoswimmers

APL Materials, 2017
In this article, a porous hollow biotemplated nanoscale helix that can serve as a low Reynolds number robotic swimmer is reported. The nanorobot utilizes repolymerized bacterial flagella from Salmonella typhimurium as a nanotemplate for biomineralization.
Jamel Ali, U Kei Cheang, Armin Darvish, Hoyeon Kim, Min Jun Kim   +4 more
doaj   +1 more source

Selective-collective scalable locomotion control of helical magnetic swimmers within confined channels using global magnetic fields

Alexandria Engineering Journal
Achieving selective-individual and collective control over multiple magnetic microrobots remains a formidable challenge. Existing techniques for controlling identical magnetic swimmers are often limited to two-dimensional, small working spaces, while ...
Armando Ramos-Sebastian, Changho Yu, Sung Hoon Kim   +2 more
doaj   +1 more source

Subgrid Mean-field Dynamo Model with Dynamical Quenching in General Relativistic Magnetohydrodynamic Simulations

The Astrophysical Journal
Large-scale magnetic fields are relevant for a number of dynamical processes in accretion disks, including driving turbulence, reconnection events, and launching outflows. Numerical simulations have indicated that the initial strengths and configurations
Hongzhe Zhou, Yosuke Mizuno, Zhenyu Zhu
doaj   +1 more source