Please use this identifier to cite or link to this item:
|Title:||Skyrmion-driven topological Hall effect in a Shastry-Sutherland magnet||Authors:||Swain, N.
Paradezhenko, G. V.
Pervishko, A. A.
|Keywords:||Science::Physics||Issue Date:||2021||Source:||Swain, N., Shahzad, M., Paradezhenko, G. V., Pervishko, A. A., Yudin, D. & Sengupta, P. (2021). Skyrmion-driven topological Hall effect in a Shastry-Sutherland magnet. Physical Review B, 104(23), 235156-1-235156-8. https://dx.doi.org/10.1103/PhysRevB.104.235156||Project:||MOE2019-T2-2-119||Journal:||Physical Review B||Abstract:||The Shastry-Sutherland model and its generalizations have been shown to capture emergent complex magnetic properties from geometric frustration in several quasi-two-dimensional quantum magnets. Using an $sd$ exchange model, we show here that metallic Shastry-Sutherland magnets can exhibit a topological Hall effect driven by magnetic skyrmions under realistic conditions. The magnetic properties are modeled with competing symmetric Heisenberg and asymmetric Dzyaloshinskii-Moriya exchange interactions, while a coupling between the spins of the itinerant electrons and the localized moments describes the magnetotransport behavior. Our results, employing complementary Monte Carlo simulations and a novel machine learning analysis to investigate the magnetic phases, provide evidence for field-driven skyrmion crystal formation for an extended range of Hamiltonian parameters. By constructing an effective tight-binding model of conduction electrons coupled to the skyrmion lattice, we clearly demonstrate the appearance of the topological Hall effect. We further elaborate on the effects of finite temperatures on both magnetic and magnetotransport properties.||URI:||https://hdl.handle.net/10356/164242||ISSN:||1098-0121||DOI:||10.1103/PhysRevB.104.235156||Rights:||© 2021 American Physical Society. All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
Updated on Jan 25, 2023
Web of ScienceTM
Updated on Jan 28, 2023
Updated on Jan 31, 2023
Updated on Jan 31, 2023
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.