Large Spin-to-Charge Conversion at Room Temperature in Extended Epitaxial Sb_2Te_3 Topological Insulator Chemically Grown on Silicon

Longo Emanuele; Belli Matteo; Alia MarioRimoldi MartinoCecchini RaimondoLongo MassimoWiemer ClaudiaLocatelli LorenzoTsipas PolychronisDimoulas AthanasiosGubbiotti GianlucaFanciulli MarcoMantovan Roberto

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Large Spin-to-Charge Conversion at Room Temperature in Extended Epitaxial Sb_2Te_3 Topological Insulator Chemically Grown on Silicon

机译：Large Spin-to-Charge Conversion at Room Temperature in Extended Epitaxial Sb_2Te_3 Topological Insulator Chemically Grown on Silicon

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Spin-charge interconversion phenomena at the interface between magnetic materials and topological insulators (TIs) are attracting enormous interest in the research effort toward the development of fast and ultra-low power devices for future information and communication technology. A large spin-to-charge (S2C) conversion efficiency in Au/Co/Au/Sb2Te3/Si(111) heterostructures based on Sb2Te3 TIs grown by metal-organic chemical vapor deposition on 4 '' Si(111) substrates is reported. By conducting room temperature spin pumping ferromagnetic resonance, a 250 enhanced charge current due to spin pumping in the Sb2Te3-containing system is measured when compared to the reference Au/Co/Au/Si(111). The corresponding inverse Edelstein effect length lambda(IEE) ranges from 0.28 to 0.61 nm, depending on the adopted methodological analysis, with the upper value being so far the largest observed for the second generation of 3D chalcogenide-based TIs. These results open the path toward the use of chemical methods to produce TIs on large area Si substrates and characterized by highly performing S2C conversion, thus marking a milestone toward future technology-transfer.

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《Advanced functional materials》 |2022年第4期|2109361.1-2109361.12|共12页
作者
Longo Emanuele; Belli Matteo; Alia MarioRimoldi MartinoCecchini RaimondoLongo MassimoWiemer ClaudiaLocatelli LorenzoTsipas PolychronisDimoulas AthanasiosGubbiotti GianlucaFanciulli MarcoMantovan Roberto;
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CNR, Unit Agrate Brianza MB, IMM, Via C Olivetti 2, I-20864 Agrate Brianza, MB, Italy;

CNR, Unit Agrate Brianza MB, IMM, Via C Olivetti 2, I-20864 Agrate Brianza, MB, Italy|European Org Nucl Res, CERN, CH-1211 Geneva 23, Switzerland;

CNR, Unit Agrate Brianza MB, IMM, Via C Olivetti 2, I-20864 Agrate Brianza, MB, Italy|CNR, Ist Microelettron & Microsistemi CNR IMM Bologna, P Gobetti 101, I-40129 Bologna, ItalyCNR, Unit Agrate Brianza MB, IMM, Via C Olivetti 2, I-20864 Agrate Brianza, MB, Italy|Univ Milano Bicocca, Dipartimento Sci Mat, Via R Cozzi 55, I-20126 Milan, Italy|CNR, IMM, Unit Rome, Via Fosso Cavaliere 100, I-00133 Rome, ItalyNatl Ctr Sci Res Demokritos, Inst Nanosci & Nanotechnol, Athens 15310, GreeceUniv Perugia, Dipartimento Fis & Geol, Sede Secondaria Perugia, Ist Officina Mat CNR CNR IOM, I-06123 Perugia, ItalyUniv Milano Bicocca, Dipartimento Sci Mat, Via R Cozzi 55, I-20126 Milan, Italy;

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Edelstein effect; ferromagnetic resonance; metal-organic chemical vapor deposition; spin pumping; spintronics; two-magnon scattering;

Large Spin-to-Charge Conversion at Room Temperature in Extended Epitaxial Sb_2Te_3 Topological Insulator Chemically Grown on Silicon

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