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dc.contributor.authorShahzad, Muniren_US
dc.contributor.authorSwain, Nyayabantaen_US
dc.contributor.authorSengupta, Pinakien_US
dc.identifier.citationShahzad, M., Swain, N. & Sengupta, P. (2020). Topological Hall effect in the Shastry-Sutherland lattice. Physical Review B, 102(24), 245132-.
dc.description.abstractWe study the classical Heisenberg model on the geometrically frustrated Shastry-Sutherland (SS) lattice with additional Dzyaloshinskii-Moriya (DM) interaction in the presence of an external magnetic field. We show that several noncollinear and noncoplanar magnetic phases, such as the flux, all-in/all-out, 3-in–1-out/3-out–1-in, and canted-flux phases are stabilized over wide ranges of parameters in the presence of the DM interaction. We discuss the role of DM interaction in stabilizing these complex magnetic phases. When coupled to these noncoplanar magnetic phases, itinerant electrons experience a finite Berry phase, which manifests in the form of topological Hall effect, whereby a nonzero transverse conductivity is observed even in the absence of a magnetic field. We study this anomalous magnetotransport by calculating the electron band structure and transverse conductivity for a wide range of parameter values, and demonstrate the existence of topological Hall effect in the SS lattice. We explore the role of the strength of itinerant electron-local moment coupling on electron transport and show that the topological Hall features evolve significantly from strong to intermediate values of the coupling strength, and are accompanied by the appearance of a finite spin Hall conductivity.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.description.sponsorshipNational Supercomputing Centre (NSCC) Singaporeen_US
dc.relation.ispartofPhysical Review Ben_US
dc.rights© 2020 American Physical Society (APS). All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society (APS).en_US
dc.titleTopological Hall effect in the Shastry-Sutherland latticeen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionPublished versionen_US
dc.subject.keywordsDzyaloshinskii-Moriya Interactionen_US
dc.description.acknowledgementWe acknowledge the use of the HPCC cluster at NTU, Singapore, and the NSCC ASPIRE1 cluster in Singapore for our numerical simulations. The work is partially supported by Grant No. MOE2014-T2-2-112 of the Ministry of Education, Singapore.en_US
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