Hydrogen-induced tunable remanent polarization in a perovskite nickelate.

Autor: Yuan Y; Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ, USA. yifan.yuan10@gmail.com., Kotiuga M; Theory and Simulation of Materials (THEOS), National Centre for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland. mkotiuga@materialsdesign.com., Park TJ; School of Materials Engineering, Purdue University, West Lafayette, IN, USA. tjp059@gmail.com., Patel RK; Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ, USA., Ni Y; Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE, USA., Saha A; School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, State College, PA, USA., Zhou H; X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA., Sadowski JT; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA., Al-Mahboob A; Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA., Yu H; School of Materials Engineering, Purdue University, West Lafayette, IN, USA., Du K; Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA., Zhu M; Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ, USA., Deng S; School of Materials Engineering, Purdue University, West Lafayette, IN, USA., Bisht RS; Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ, USA., Lyu X; School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA., Wu CM; Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ, USA., Ye PD; School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA., Sengupta A; School of Electrical Engineering and Computer Science, The Pennsylvania State University, University Park, State College, PA, USA., Cheong SW; Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA., Xu X; Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE, USA., Rabe KM; Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ, USA., Ramanathan S; Department of Electrical & Computer Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ, USA. shriram.ramanathan@rutgers.edu.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Jun 03; Vol. 15 (1), pp. 4717. Date of Electronic Publication: 2024 Jun 03.
DOI: 10.1038/s41467-024-49213-0
Abstrakt: Materials with field-tunable polarization are of broad interest to condensed matter sciences and solid-state device technologies. Here, using hydrogen (H) donor doping, we modify the room temperature metallic phase of a perovskite nickelate NdNiO 3 into an insulating phase with both metastable dipolar polarization and space-charge polarization. We then demonstrate transient negative differential capacitance in thin film capacitors. The space-charge polarization caused by long-range movement and trapping of protons dominates when the electric field exceeds the threshold value. First-principles calculations suggest the polarization originates from the polar structure created by H doping. We find that polarization decays within ~1 second which is an interesting temporal regime for neuromorphic computing hardware design, and we implement the transient characteristics in a neural network to demonstrate unsupervised learning. These discoveries open new avenues for designing ferroelectric materials and electrets using light-ion doping.
(© 2024. The Author(s).)
Databáze: MEDLINE
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