Cr-Doped Ge-Core/Si-Shell Nanowire: An Antiferromagnetic Semiconductor Aryal, Sandip Paudyal, Durga Pati, Ranjit
dc.contributor.department Ames Laboratory
dc.contributor.department Electrical and Computer Engineering
dc.contributor.other Ames Laboratory
dc.contributor.other Electrical and Computer Engineering 2021-03-13T06:52:19.000 2021-04-29T23:39:29Z 2021-04-29T23:39:29Z 2022-02-12 2021-02-12
dc.description.abstract <p>An antiferromagnet offers many important functionalities such as opportunities for electrical control of magnetic domains, immunity from magnetic perturbations, and fast spin dynamics. Introducing some of these intriguing features of an antiferromagnet into a low dimensional semiconductor core–shell nanowire offers an exciting pathway for its usage in antiferromagnetic semiconductor spintronics. Here, using a quantum mechanical approach, we predict that the Cr-doped Ge-core/Si-shell nanowire behaves as an antiferromagnetic semiconductor. The origin of antiferromagnetic spin alignments between Cr is attributed to the superexchange interaction mediated by the p<em>z</em> orbitals of the Ge atoms that are bonded to Cr. A weak spin–orbit interaction was found in this material, suggesting a longer spin coherence length. The spin-dependent quantum transport calculations in the Cr-doped nanowire junction reveals a switching feature with a high ON/OFF current ratio (∼41 times higher for the ON state at a relatively small bias of 0.83 V).</p>
dc.identifier archive/
dc.identifier.articleid 1851
dc.identifier.contextkey 22040612
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/850
dc.relation.ispartofseries IS-J 10427
dc.source.bitstream archive/|||Sat Jan 15 02:12:48 UTC 2022
dc.source.uri 10.1021/acs.nanolett.0c04971
dc.subject antiferromagnetism
dc.subject semiconductor core−shell nanowire
dc.subject superexchange
dc.subject electronic structure
dc.subject spin−orbit coupling
dc.subject quantum transport
dc.title Cr-Doped Ge-Core/Si-Shell Nanowire: An Antiferromagnetic Semiconductor
dc.type article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication a75a044c-d11e-44cd-af4f-dab1d83339ff