View : 223 Download: 0

Analog Memory and Synaptic Plasticity in an InGaZnO-Based Memristor by Modifying Intrinsic Oxygen Vacancies

Title
Analog Memory and Synaptic Plasticity in an InGaZnO-Based Memristor by Modifying Intrinsic Oxygen Vacancies
Authors
MahataChandreswarSoHyojinKimSoominSungjunChoSeongjae
Ewha Authors
조성재
SCOPUS Author ID
조성재scopus
Issue Date
2023
Journal Title
Materials
ISSN
1996-1944JCR Link
Citation
Materials vol. 16, no. 24
Keywords
charge trappingInGaZnOlong-term potentiationmultilevel memorypaired-pulse facilitationshort-term plasticityspike-rate-dependent plasticity
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
This study focuses on InGaZnO-based synaptic devices fabricated using reactive radiofrequency sputtering deposition with highly uniform and reliable multilevel memory states. Electron trapping and trap generation behaviors were examined based on current compliance adjustments and constant voltage stressing on the ITO/InGaZnO/ITO memristor. Using O2 + N2 plasma treatment resulted in stable and consistent cycle-to-cycle memory switching with an average memory window of ~95.3. Multilevel resistance states ranging from 0.68 to 140.7 kΩ were achieved by controlling the VRESET within the range of −1.4 to −1.8 V. The modulation of synaptic weight for short-term plasticity was simulated by applying voltage pulses with increasing amplitudes after the formation of a weak conductive filament. To emulate several synaptic behaviors in InGaZnO-based memristors, variations in the pulse interval were used for paired-pulse facilitation and pulse frequency-dependent spike rate-dependent plasticity. Long-term potentiation and depression are also observed after strong conductive filaments form at higher current compliance in the switching layer. Hence, the ITO/InGaZnO/ITO memristor holds promise for high-performance synaptic device applications. © 2023 by the authors.
DOI
10.3390/ma16247510
Appears in Collections:
공과대학 > 전자전기공학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

BROWSE