1 CAS Key Laboratory of Nanoscale Physics and Devices;Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;3 Institute of Advanced Materials, Beijing Normal University, Beijing 100875, China;4 Beijing Key Laboratory for Nanomaterials and Nanodevices, Beijing 100190, China;5 Songshan Lake Materials Laboratory, Dongguan 523808, China>
Synapse emulation is very important for realizing neuromorphic computing, which could overcome the energy and throughput limitations of today's computing architectures. Memristors have been extensively studied for using in nonvolatile memory storage and neuromorphic computing. In this paper, we report the fabrication of vertical sandwiched memristor device using ultrathin quasi-two-dimensional gallium oxide produced by squeegee method. The as-fabricated two-terminal memristor device exhibited the essential functions of biological synapses, such as depression and potentiation of synaptic weight, transition from short time memory to long time memory, spike-timing-dependent plasticity, and spike-rate-dependent plasticity. The synaptic weight of the memristor could be tuned by the applied voltage pulse, number, width, and frequency. We believe that the injection of the top Ag cations should play a significant role for the memristor phenomenon. The ultrathin of medium layer represents an advance to integration in vertical direction for future applications and our results provide an alternative way to fabricate synaptic devices.
Project supported by the National Natural Science Foundation of China (Grant No. 11834017), the Strategic Priority Research Program of Chinese Academy of Sciences (CAS) (Grant No. XDB30000000), the Key Research Program of Frontier Sciences of the CAS (Grant No. QYZDB-SSW-SLH004), the National Key R&D Program of China (Grant No. 2016YFA0300904), and the Fundamental Research Funds for the Central Universities, China (Grant No. 310421101).
Shuopei Wang, Congli He, Jian Tang, Rong Yang, Dongxia Shi, Guangyu Zhang. Electronic synapses based on ultrathin quasi-two-dimensional gallium oxide memristor[J]. Chin. Phys. B, 2019, 28(1): 017304.