Abstract
Amorphous KNbO3 (KN) films were grown on a TiN/SiO2/Si substrate to synthesize a KN memristor as a potential artificial synapse. The Pt/KN/TiN memristor exhibited typical and reliable bipolar switching behavior with multiple resistance levels. It also showed the transmission properties of a biological synapse, with a good conductance modulation linearity. Moreover, the KN memristor can emulate various biological synaptic plasticity characteristics including short-term plasticity, long-term plasticity, spike-rate dependent plasticity, paired-pulse facilitation, and post-tetanic potentiation by controlling the number and rate of the potentiation spike. Spike-timing-dependent plasticity (STDP), which is an essential property of biological synapses, is also realized in KN memristor. The synaptic plasticity of the KN memristor can be explained by oxygen vacancy movement and oxygen vacancy filaments. The metaplasticity of biological synapses was also implemented in the KN memristor, including metaplasticities of long-term potentiation and depression, and of STDP. Therefore, the KN memristor could be used as an artificial synapse in neuromorphic computing systems.
| Original language | English |
|---|---|
| Journal | ACS Applied Materials and Interfaces |
| DOIs | |
| Publication status | Accepted/In press - 2018 Mar 20 |
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ASJC Scopus subject areas
- Materials Science(all)
Cite this
Synaptic plasticity and metaplasticity of biological synapse realized in a KNbO3 memristor for application to artificial synapse. / Lee, Tae Ho; Hwang, Hyun Gyu; Woo, Jong Un; Kim, Dae Hyeon; Kim, Tae Wook; Nahm, Sahn.
In: ACS Applied Materials and Interfaces, 20.03.2018.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Synaptic plasticity and metaplasticity of biological synapse realized in a KNbO3 memristor for application to artificial synapse
AU - Lee, Tae Ho
AU - Hwang, Hyun Gyu
AU - Woo, Jong Un
AU - Kim, Dae Hyeon
AU - Kim, Tae Wook
AU - Nahm, Sahn
PY - 2018/3/20
Y1 - 2018/3/20
N2 - Amorphous KNbO3 (KN) films were grown on a TiN/SiO2/Si substrate to synthesize a KN memristor as a potential artificial synapse. The Pt/KN/TiN memristor exhibited typical and reliable bipolar switching behavior with multiple resistance levels. It also showed the transmission properties of a biological synapse, with a good conductance modulation linearity. Moreover, the KN memristor can emulate various biological synaptic plasticity characteristics including short-term plasticity, long-term plasticity, spike-rate dependent plasticity, paired-pulse facilitation, and post-tetanic potentiation by controlling the number and rate of the potentiation spike. Spike-timing-dependent plasticity (STDP), which is an essential property of biological synapses, is also realized in KN memristor. The synaptic plasticity of the KN memristor can be explained by oxygen vacancy movement and oxygen vacancy filaments. The metaplasticity of biological synapses was also implemented in the KN memristor, including metaplasticities of long-term potentiation and depression, and of STDP. Therefore, the KN memristor could be used as an artificial synapse in neuromorphic computing systems.
AB - Amorphous KNbO3 (KN) films were grown on a TiN/SiO2/Si substrate to synthesize a KN memristor as a potential artificial synapse. The Pt/KN/TiN memristor exhibited typical and reliable bipolar switching behavior with multiple resistance levels. It also showed the transmission properties of a biological synapse, with a good conductance modulation linearity. Moreover, the KN memristor can emulate various biological synaptic plasticity characteristics including short-term plasticity, long-term plasticity, spike-rate dependent plasticity, paired-pulse facilitation, and post-tetanic potentiation by controlling the number and rate of the potentiation spike. Spike-timing-dependent plasticity (STDP), which is an essential property of biological synapses, is also realized in KN memristor. The synaptic plasticity of the KN memristor can be explained by oxygen vacancy movement and oxygen vacancy filaments. The metaplasticity of biological synapses was also implemented in the KN memristor, including metaplasticities of long-term potentiation and depression, and of STDP. Therefore, the KN memristor could be used as an artificial synapse in neuromorphic computing systems.
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UR - http://www.scopus.com/inward/citedby.url?scp=85049856283&partnerID=8YFLogxK
U2 - 10.1021/acsami.8b04550
DO - 10.1021/acsami.8b04550
M3 - Article
AN - SCOPUS:85049856283
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
ER -