Abstract：
:We studied the spin-transfer torque (STT) in graphene based normal-metal/topological-insulator/ferromagnet heterostructures (N/TI/F), which is induced by the helical spin-polarized current in the quantum spin Hall insulator. We found that the STT is comparable in magnitude to the STT in ferromagnetic-normal- ferromagnetic graphene junction, while not requiring additional ferromagnetic layer with fixed magnetization, which makes it advantageous for the manipulation of magnetic devices in spintronics. More interestingly, the STT is very robust in our proposed nanostructure, as it is immune to changes in the geometry due to an asymmetrically notch or the presence of random nanopores in the quantum spin Hall insulator. Our theoretical prediction suggests that graphene based quantum spin Hall insulator could be used for very efficient magnetization manipulation for magnetic materials.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zhang Q,Chan KS,Li Jdoi
10.1038/s41598-018-22680-4subject
Has Abstractpub_date
2018-03-12 00:00:00pages
4343issue
1issn
2045-2322pii
10.1038/s41598-018-22680-4journal_volume
8pub_type
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pub_type： 杂志文章
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journal_title：Scientific reports
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