Polarization and Resistive Switching in Epitaxial 2 nm Hf0.5Zr0.5O2 Tunnel Junctions

Financial support from the Spanish Ministry of Science and Innovation, through the Severo Ochoa FUNFUTURE (CEX2019-000917-S), MAT2017-85232-R (AEI/FEDER, EU) and PID2019-107727RB-I00 projects, and from Generalitat de Catalunya (2017 SGR 1377) is acknowledged. M.C.S. acknowledges the fellowship from "la Caixa Foundation" (ID 100010434; LCF/BQ/IN17/11620051). I.F. acknowledges Ramon y Cajal contract RYC-2017- 22531. Project supported by a 2020 Leonardo Grant for Researchers and Cultural Creators, BBVA Foundation. M.C.S and S.E. work has been done as a part of her Ph.D. program in Physics at Universitat Autonoma de Barcelona. H.T. work has been done as a part of her Ph.D. program in Material Science at Universitat Autonoma de Barcelona. S.E. acknowledges the Spanish Ministry of Economy, Competitiveness and Universities for his PhD contract (SEV-2015-0496-16-3) and its co-funding by the ESF. HT is financially supported by China Scholarship Council (CSC) with No. 201906050014. Anna Crespi and Francesc Xavier Campos are acknowledged for valuable support on structural characterization. Electron microscopy observations were carried out at the ICTS-CNME at UCM, Madrid. The authors acknowledge the ICTS-CNME for offering access to their instruments and expertise. The STEM specimens were prepared in the Service of Dual Microscopy FESEM & FIB, being part of the Central Services for Research of the University of Malaga and placed in the Supercomputing and Bioinnovation Center.