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Graphene on Chromia: A System for Beyond-Room-Temperature Spintronics.
He, Keke; Barut, Bilal; Yin, Shenchu; Randle, Michael D; Dixit, Ripudaman; Arabchigavkani, Nargess; Nathawat, Jubin; Mahmood, Ather; Echtenkamp, Will; Binek, Christian; Dowben, Peter A; Bird, Jonathan P.
Affiliation
  • He K; Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York, 14260, USA.
  • Barut B; Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York, 14260, USA.
  • Yin S; Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York, 14260, USA.
  • Randle MD; Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York, 14260, USA.
  • Dixit R; Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York, 14260, USA.
  • Arabchigavkani N; Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York, 14260, USA.
  • Nathawat J; Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York, 14260, USA.
  • Mahmood A; Department of Physics and Astronomy, Theodore Jorgensen Hall, University of Nebraska Lincoln, Lincoln, Nebraska, 68588-0299, USA.
  • Echtenkamp W; Department of Physics and Astronomy, Theodore Jorgensen Hall, University of Nebraska Lincoln, Lincoln, Nebraska, 68588-0299, USA.
  • Binek C; Department of Physics and Astronomy, Theodore Jorgensen Hall, University of Nebraska Lincoln, Lincoln, Nebraska, 68588-0299, USA.
  • Dowben PA; Department of Physics and Astronomy, Theodore Jorgensen Hall, University of Nebraska Lincoln, Lincoln, Nebraska, 68588-0299, USA.
  • Bird JP; Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, New York, 14260, USA.
Adv Mater ; 34(12): e2105023, 2022 Mar.
Article in En | MEDLINE | ID: mdl-34986269
ABSTRACT
Evidence of robust spin-dependent transport in monolayer graphene, deposited on the (0001) surface of the antiferromagnetic (AFM)/magneto-electric oxide chromia (Cr2 O3 ), is provided. Measurements performed in the non-local spin-Hall geometry reveal a robust signal that is present at zero external magnetic field and which is significantly larger than any possible ohmic contribution. The spin-related signal persists well beyond the Néel temperature (≈307 K) that defines the transition between the AFM and paramagnetic states, remaining visible at the highest studied temperature of close to 450 K. This robust character is consistent with prior theoretical studies of the graphene/Cr2 O3 system, predicting that the lifting of sub-lattice symmetry in the graphene shall induce an effective spin-orbit term of ≈40 meV. Overall, the results indicate that graphene-on-chromia heterostructures are a highly promising framework for the implementation of spintronic devices, capable of operation well beyond room temperature.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Adv Mater Journal subject: BIOFISICA / QUIMICA Year: 2022 Document type: Article Affiliation country: United States
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Adv Mater Journal subject: BIOFISICA / QUIMICA Year: 2022 Document type: Article Affiliation country: United States