Chiral symmetry breaking for deterministic switching of perpendicular magnetization by spin-orbit torque

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dc.creatorWu, Hao
dc.creatorNance, John
dc.creatorRazavi, Seyed Armin
dc.creatorLujan, David
dc.creatorDai, Bingqian
dc.creatorLiu, Yuxiang
dc.creatorHe, Haoran
dc.creatorCui, Baoshan
dc.creatorWu, Di
dc.creatorWong, Kin
dc.creatorSobotkiewich, Kemal
dc.creatorLi, Xiaoqin
dc.creatorCarman, Gregory P.
dc.creatorWang, Kang L.
dc.date.accessioned2024-01-25T15:06:24Z
dc.date.available2024-01-25T15:06:24Z
dc.date.issued2020-12-18
dc.description.abstractSymmetry breaking is a characteristic to determine which branch of a bifurcation system follows upon crossing a critical point. Specifically, in spin-orbit torque (SOT) devices, a fundamental question arises: how to break the symmetry of the perpendicular magnetic moment by the in-plane spin polarization? Here, we show that the chiral symmetry breaking by the antisymmetric Dzyaloshinskii–Moriya interaction (DMI) can induce the deterministic SOT switching of the perpendicular magnetization. By introducing a gradient of saturation magnetization or magnetic anisotropy, non- collinear spin textures are formed by the gradient of effective SOT strength, and thus the chiral symmetry of the SOT-induced spin textures is broken by the DMI, resulting in the deterministic magnetization switching. We introduce a strategy to induce an out- of-plane (z) gradient of magnetic properties, as a practical solution for the wafer-scale manufacture of SOT devices.
dc.description.departmentCenter for Dynamics and Control of Materials
dc.description.sponsorshipThis work is supported by the NSF Award Nos. 1611570 and 1619027, the Nanosystems Engineering Research Center for Translational Applications of Nanoscale Multiferroic Systems (TANMS), the U.S. Army Research Office MURI program under Grants No. W911NF-16-1-0472 and No. W911NF-15-1-10561, and the Spins and Heat in Nanoscale Electronic Systems (SHINES) Center funded by the US Department of Energy (DOE), under Award No. DE-SC0012670. D.L and X. L. are funded by an NSF MRSEC under Cooperative Agreement No. DMR-1720595. We are also grateful to the support from the Function Accelerated nanoMaterial Engineering (FAME) Center, and a Semiconductor Research Corporation (SRC) program sponsored by Microelectronics Advanced Research Corporation (MARCO) and Defense Advanced Research Projects Agency (DARPA).
dc.identifier.doihttps://doi.org/10.1021/acs.nanolett.0c03972
dc.identifier.urihttps://hdl.handle.net/2152/123501
dc.identifier.urihttps://doi.org/10.26153/tsw/50297
dc.language.isoen_US
dc.relation.ispartofCenter for Dynamics and Control of Materials Publications
dc.rights.restrictionOpen
dc.subjecttorque
dc.titleChiral symmetry breaking for deterministic switching of perpendicular magnetization by spin-orbit torque
dc.typeArticle

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