Tunable room-temperature spin galvanic and spin Hall effects in van der Waals heterostructures
Benítez, L. Antonio (Institut Català de Nanociència i Nanotecnologia)
Savero Torres, Williams Fernando (Institut Català de Nanociència i Nanotecnologia)
Sierra, Juan F. (Institut Català de Nanociència i Nanotecnologia)
Timmermans, Matias (Institut Català de Nanociència i Nanotecnologia)
Garcia, José H. (Institut Català de Nanociència i Nanotecnologia)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
Costache, Marius Vasile (Institut Català de Nanociència i Nanotecnologia)
Valenzuela, Sergio O. (Institut Català de Nanociència i Nanotecnologia)

Date:	2020
Abstract:	Spin-orbit coupling stands as a powerful tool to interconvert charge and spin currents and to manipulate the magnetization of magnetic materials through spin-torque phenomena. However, despite the diversity of existing bulk materials and the recent advent of interfacial and low-dimensional effects, control of this interconversion at room temperature remains elusive. Here, we demonstrate strongly enhanced room-temperature spin-to-charge interconversion in graphene driven by the proximity of WS. By performing spin precession experiments in appropriately designed Hall bars, we separate the contributions of the spin Hall and the spin galvanic effects. Remarkably, their corresponding conversion efficiencies can be tailored by electrostatic gating in magnitude and sign, peaking near the charge neutrality point with an equivalent magnitude that is comparable to the largest efficiencies reported to date. Such electric-field tunability provides a building block for spin generation free from magnetic materials and for ultra-compact magnetic memory technologies.
Grants:	European Commission 785219 European Commission 665919 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad MAT2016-75952-R Ministerio de Economía y Competitividad FIS2015-62641-ERC Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-827
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Building blockes ; Bulk materials ; Charge neutrality ; Interconversions ; Low dimensional ; Magnetic memory ; Spin precession ; Spin-galvanic effects
Published in:	Nature materials, Vol. 19, issue 2 (Feb. 2020) , p. 170-175, ISSN 1476-4660

DOI: 10.1038/s41563-019-0575-1

Postprint 18 p, 1.5 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