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Tailoring magnetic insulator proximity effects in graphene : First-principles calculations
Hallal, Ali (Université Grenoble Alpes)
Ibrahim, Fatima (Université Grenoble Alpes)
Yang, Hongxin (Université Grenoble Alpes)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Chshiev, Mairbek (Université Grenoble Alpes)

Date: 2017
Abstract: We report a systematic first-principles investigation of the influence of different magnetic insulators on the magnetic proximity effect induced in graphene. Four different magnetic insulators are considered: two ferromagnetic europium chalcogenides namely EuO and EuS and two ferrimagnetic insulators yttrium iron garnet (YIG) and cobalt ferrite (CFO). The obtained exchange-splitting in graphene varies from tens to hundreds of meV depending on substrates. We find an electron doping to graphene induced by YIG and europium chalcogenides substrates, that shift the Fermi level above the Dirac cone up to 0. 78 eV and 1. 3 eV respectively, whereas hole doping shifts the Fermi level down below the Dirac cone about 0. 5 eV in graphene/CFO. Furthermore, we study the variation of the extracted exchange and tight-binding parameters as a function of the EuO and EuS thicknesses. We show that those parameters are robust to thickness variation such that a single monolayer of magnetic insulator can induce a strong magnetic proximity effect on graphene. Those findings pave the way towards possible engineering of graphene spin-gating by proximity effect especially in view of recent experimental advancements.
Grants: European Commission 696656
Ministerio de Economía y Competitividad FIS2015-67767-P
Ministerio de Economía y Competitividad SEV-2013-0295
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: Article ; recerca ; Versió publicada
Subject: Graphene magnetism ; Graphene spintronics ; Magnetic properties of graphene interfaces ; Proximity induced effects in graphene ; Spin dependent transport
Published in: 2D Materials, Vol. 4, Núm. 2 (June 2017) , article 025074, ISSN 2053-1583

DOI: 10.1088/2053-1583/aa6663


8 p, 1.4 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2018-07-20, last modified 2022-09-08



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