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dc.contributor.authorLaref, Slimane
dc.contributor.authorGhosh, Sumit
dc.contributor.authorTsymbal, Evgeny Y.
dc.contributor.authorManchon, Aurelien
dc.date.accessioned2020-02-13T11:42:39Z
dc.date.available2020-02-13T11:42:39Z
dc.date.issued2020-01-23
dc.identifier.urihttp://hdl.handle.net/10754/661517
dc.description.abstractWhile some of the most elegant applications of topological insulators, such as quantum anomalous Hall effect, require the preservation of Dirac surface states in the presence of time-reversal symmetry breaking, other phenomena such as spin-charge conversion rather rely on the ability for these surface states to imprint their spin texture on adjacent magnetic layers. In this work, we investigate the spin-momentum locking of the surface states of a wide range of monolayer transition metals (3$d$-TM) deposited on top of Bi$_{2}$Se$_{3}$ topological insulators using first principles calculations. We find an anticorrelation between the magnetic moment of the 3$d$-TM and the magnitude of the spin-momentum locking {\em induced} by the Dirac surface states. While the magnetic moment is large in the first half of the 3$d$ series, following Hund's rule, the spin-momentum locking is maximum in the second half of the series. We explain this trend as arising from a compromise between intra-atomic magnetic exchange and covalent bonding between the 3$d$-TM overlayer and the Dirac surface states. As a result, while Cr and Mn overlayers can be used successfully for the observation of quantum anomalous Hall effect or the realization of axion insulators, Co and Ni are substantially more efficient for spin-charge conversion effects, e.g. spin-orbit torque and charge pumping.
dc.description.sponsorshipThis work has been supported by the King Abdullah University of Science and Technology (KAUST) through the Office of Sponsored Research (OSR) [Grant Number OSR-2017-CRG6-3390]. The authors acknowledge computing time on the SHAHEEN supercomputer at KAUST Supercomputing Centre and the team assistance.
dc.publisherarXiv
dc.relation.urlhttps://arxiv.org/pdf/2001.08538
dc.rightsArchived with thanks to arXiv
dc.titleInduced Spin-texture at 3$d$ Transition Metal/Topological Insulator Interfaces
dc.typePreprint
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSpintronics Theory Group
dc.eprint.versionPre-print
dc.contributor.institutionDepartment of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
dc.identifier.arxividarXiv:2001.08538
kaust.personLaref, Slimane
kaust.personGhosh, Sumit
kaust.personManchon, Aurelien
refterms.dateFOA2020-02-13T11:43:32Z
kaust.acknowledged.supportUnitKAUST Supercomputing Centre
kaust.acknowledged.supportUnitOffice of Sponsored Research (OSR)


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