Data Storage and Neuromorphic Synaptic Properties of Asymmetric (SrTiO3)4/(LiNbO3)1/(LaAlO3)4 Superlattice Ferroelectric Tunnel Junctions
Source abstract
Abstract
Lithium niobate (LiNbO 3 ) crystals have attracted significant attention for their exceptional electro-optic and piezoelectric properties. Fabricating LiNbO 3 -based ferroelectric tunnel junctions requires a nanoscale LiNbO 3 thin film with superior ferroelectric characteristics. Here, we present (SrTiO 3 ) 4 /(LiNbO 3 ) 1 /(LaAlO 3 ) 4 superlattices, which exhibit stable polarization switching and enhanced polarization compared to LiNbO 3 thin films. The asymmetric superlattice shows an ON/OFF ratio of ∼10 3, with excellent repeatability and multilevel storage capabilities. More interestingly, it simulates various synaptic plastic behaviors, including excitatory postsynaptic current, paired-pulse facilitation, paired-pulse depression, and spike number-dependent plasticity. These findings highlight the great potential of LiNbO 3 -based superlattices for memristor devices.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Advanced Memory and Neural Computing · Ferroelectric and Negative Capacitance Devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physics and Physical Engineering, Qufu Normal University
Institute of Novel Semiconductors, State Key Laboratory of Crystal Materials
Shandong University
School of Material Science and Engineering
University of Jinan
Funding
National Natural Science Foundation of China
References (40)
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