1. Visualizing Giant Ferroelectric Gating Effects in Large-Scale WSe2/BiFeO3 Heterostructures
- Author
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Raphaël Salazar, Sara Varotto, Céline Vergnaud, Vincent Garcia, Stéphane Fusil, Julien Chaste, Thomas Maroutian, Alain Marty, Frédéric Bonell, Debora Pierucci, Abdelkarim Ouerghi, François Bertran, Patrick Le Fèvre, Matthieu Jamet, Manuel Bibes, Julien Rault, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Unité mixte de physique CNRS/Thales (UMPhy CNRS/THALES), THALES [France]-Centre National de la Recherche Scientifique (CNRS), SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), ANR-18-CE24-0007,MAGICVALLEY,Polarisation de vallée induite par couplage d'échange magnétique dans les matériaux 2D à grande échelle(2018), and ANR-18-CE24-0015,CORNFLAKE,Contrôle ferroélectrique du couplage spin-orbite dans les dichalcogenides de métaux de transition(2018)
- Subjects
perovskite oxides ,Condensed Matter - Materials Science ,Strongly Correlated Electrons (cond-mat.str-el) ,quantum materials ,Mechanical Engineering ,ferroelectrics ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,Bioengineering ,General Chemistry ,Condensed Matter Physics ,Condensed Matter - Strongly Correlated Electrons ,heterostructures ,transition-metal dichalcogenides ,General Materials Science ,angle-resolved photoemission spectroscopy ,[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] - Abstract
International audience; Multilayers based on quantum materials (complex oxides, topological insulators, transition-metal dichalcogenides, etc.) have enabled the design of devices that could revolutionize microelectronics and optoelectronics. However, heterostructures incorporating quantum materials from different families remain scarce, while they would immensely broaden the range of possible applications. Here we demonstrate the large-scale integration of compounds from two highly multifunctional families: perovskite oxides and transition-metal dichalcogenides (TMDs). We couple BiFeO 3 , a room-temperature multiferroic oxide, and WSe 2 , a semiconducting two-dimensional material with potential for photovoltaics and photonics. WSe 2 is grown by molecular beam epitaxy and transferred on a centimeter-scale onto BiFeO 3 films. Using angle-resolved photoemission spectroscopy, we visualize the electronic structure of 1 to 3 monolayers of WSe 2 and evidence a giant energy shift as large as 0.75 eV induced by the ferroelectric polarization direction in the underlying BiFeO 3. Such a strong shift opens new perspectives in the efficient manipulation of TMD properties by proximity effects.
- Published
- 2022
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