Gate‐Tunable Anisotropic Oxygen Ion Migration in SrCoOx: Toward Emerging Oxide‐Based Artificial Synapses
Gate‐Tunable Anisotropic Oxygen Ion Migration in SrCoOx: Toward Emerging Oxide‐Based Artificial Synapses
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SrCoOx 中栅极可调的各向异性氧离子迁移：走向新兴的基于氧化物的人工突触
DOI：
10.1002/aisy.202200287
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发表时间：
2023-01
影响因子：
7.4
通讯作者：
Tingting Miao;Bin Cui;Cungang Huang;Di Wang;Long Liu;Weikang Liu;Yongzhe Li;Ruiyue Chu
中科院分区：
文献类型：
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作者：
Tingting Miao;Bin Cui;Cungang Huang;Di Wang;Long Liu;Weikang Liu;Yongzhe Li;Ruiyue Chu
基于电场控制离子迁移的人工突触的构建已被开发为实现具有低能耗优势的智能设备的一种有前景的方法。然而，人工突触如何模仿生物系统复杂的突触多样性仍然是一个非常具有挑战性的任务。在此，使用离子液体门控诱导的氧离子迁移来实现绝缘SrCoO 2. 5和金属SrCoO 3之间的可逆相变，该相变具有各向异性动力学，这是由于氧沿着沿着[110]晶体取向的快速输运通道。晶体取向依赖的氧离子迁移和由此产生的金属-绝缘体转变提供了一个有趣的机会，可以建立各种具有不同性能的人工突触，如兴奋或抑制特性，学习准确性和合作能力。我们的研究结果不仅深入了解了氧化物中的各向异性离子迁移，而且可能是开发各种基于氧化物的人工神经网络的基础性一步。
The construction of artificial synapse based on the electric field‐controlled ion migration has been developed to be a prospective approach to achieving intelligent devices with advantage of low‐energy consumption. However, it is still a very challenging task for artificial synapses to imitate the complex synapse diversity of biological system. Herein, the ionic liquid gating induced oxygen ion migration to realize the reversible phase transition between insulating SrCoO2.5 and metallic SrCoO3 with anisotropic dynamics due to the fast oxygen transport channel along [110] crystal orientation is used. The crystal orientation‐dependent oxygen ion migration and resultant metal–insulator transition offer an intriguing opportunity to build up a variety of artificial synapses with different performances, like excitatory or inhibitory characters, learning accuracy, and cooperation capability. Our findings not only give an insight into the anisotropic ion migration in oxides but also could be a fundamental step toward the development of diverse oxide‐based artificial neural networks.