Condensed Matter Physics by Dax Crum
Nature Communications, 2015
Thin-film sub-5 nm magnetic skyrmions constitute an ultimate scaling alternative for future digit... more Thin-film sub-5 nm magnetic skyrmions constitute an ultimate scaling alternative for future digital data storage. Skyrmions are robust noncollinear spin textures that can be moved and manipulated by small electrical currents. Here we show here a technique to detect isolated nanoskyrmions with a current perpendicular-to-plane geometry, which has immediate implications for device concepts. We explore the physics behind such a mechanism by studying the atomistic electronic structure of the magnetic quasiparticles. We investigate from first principles how the isolated skyrmion local-density-of-states which tunnels into the vacuum, when compared with the ferromagnetic background, is modified by the site-dependent spin mixing of electronic states with different relative canting angles. Local transport properties are sensitive to this effect, as we report an atomistic conductance anisotropy of up to ∼20% for magnetic skyrmions in Pd/Fe/Ir(111) thin films. In single skyrmions, engineering this spin-mixing magnetoresistance could possibly be incorporated in future magnetic storage technologies.
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Solid-State Electronics by Dax Crum
2014 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD), 2014
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2015 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD), 2015
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Condensed Matter Physics by Dax Crum
Solid-State Electronics by Dax Crum