Intrinsic magnon Nernst effect in pyrochlore iridate thin films

dc.creatorMa, Bowen
dc.creatorFiete, Gregory A.
dc.date.accessioned2024-02-05T18:46:26Z
dc.date.available2024-02-05T18:46:26Z
dc.date.issued2021-11-09
dc.description.abstractWe theoretically study the magnon spin thermal transport using a strong coupling approach in py- rochlore iridate trilayer thin films grown along the [111] direction. As a result of the Dzyaloshinskii- Moriya interaction (DMI), the spin configuration of the ground state is an all-in/all-out ordering on neighboring tetrahedra of the pyrochlore lattice. In such a state, the system has an inversion symmetry and a Nernst-type thermal spin current response is well defined. We calculate the tem- perature dependence of the magnon Nernst response with respect to the magnon band topology controlled by the spin-orbit coupling parameters and observe topologically protected chiral edge modes over a range of parameters. Our study complements prior work on the magnon thermal Hall effect in thin-film pyrochlore iridates and suggests that the [111] grown thin-film pyrochlore iridates are a promising candidate for thermal spin transport and spin caloritronic devices.
dc.description.departmentCenter for Dynamics and Control of Materials
dc.description.sponsorshipWe gratefully acknowl- edge support from NSF DMR-1949701 and NSF DMR- 2114825, with additional support from the NSF through the Center for Dynamics and Control of Materials: an NSF MRSEC under Cooperative Agreement No. DMR- 1720595. This work was performed in part at the Aspen Center for Physics, which is supported by National Sci- ence Foundation grant PHY-1607611.
dc.identifier.doihttps://doi.org/10.48550/arXiv.2107.09613
dc.identifier.urihttps://hdl.handle.net/2152/123583
dc.identifier.urihttps://doi.org/10.26153/tsw/50377
dc.language.isoen_US
dc.publisherAmerican Physical Society
dc.relation.ispartofCenter for Dynamics and Control of Materials Publications
dc.rights.restrictionOpen
dc.subjectNernst
dc.titleIntrinsic magnon Nernst effect in pyrochlore iridate thin films
dc.typeArticle

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