Other Publications (1)
Articles by Edouard Lesne in JoVE
Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures Diogo Castro Vaz1, Edouard Lesne1,2, Anke Sander1, Hiroshi Naganuma1,3, Eric Jacquet1, Jacobo Santamaria1,4, Agnès Barthélémy1, Manuel Bibes1 1Unité Mixte de Physique CNRS/Thales, Université Paris-Saclay, 2Max Planck Institut für Mikrostrukturphysik, 3Department of Applied Physics, Tohoku University, 4Instituto de Magnetismo Aplicado, Universidad Complutense de Madrid We fabricate metal/LaAlO3/SrTiO3 heterostructures using a combination of pulsed laser deposition and in situ magnetron sputtering. Through magnetotransport and in situ X-ray photoelectron spectroscopy experiments, we investigate the interplay between electrostatic and chemical phenomena of the quasi two-dimensional electron gas formed in this system.
Other articles by Edouard Lesne on PubMed
Tuning Up or Down the Critical Thickness in LaAlO3 /SrTiO3 Through In Situ Deposition of Metal Overlayers Advanced Materials (Deerfield Beach, Fla.). | Pubmed ID: 28505388 The quasi 2D electron system (q2DES) that forms at the interface between LaAlO3 and SrTiO3 has attracted much attention from the oxide electronics community. One of its hallmark features is the existence of a critical LaAlO3 thickness of 4 unit-cells (uc) for interfacial conductivity to emerge. In this paper, the chemical, electronic, and transport properties of LaAlO3 /SrTiO3 samples capped with different metals grown in a system combining pulsed laser deposition, sputtering, and in situ X-ray photoemission spectroscopy are investigated. The results show that for metals with low work function a q2DES forms at 1-2 uc of LaAlO3 and is accompanied by a partial oxidation of the metal, a phenomenon that affects the q2DES properties and triggers the formation of defects. In contrast, for noble metals, the critical thickness is increased above 4 uc. The results are discussed in terms of a hybrid mechanism that incorporates electrostatic and chemical effects.