Spatial Interactions in Hydrogenated Perovskite Nickelate Synaptic Networks
Spatial Interactions in Hydrogenated Perovskite Nickelate Synaptic Networks
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DOI：
10.1021/acs.nanolett.3c02076
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发表时间：
2023-07-28
期刊：
影响因子：
10.8
通讯作者：
Ramanathan, Shriram
中科院分区：
文献类型：
--
作者：
Bisht, Ravindra Singh;Park, Jaeseoung;Ramanathan, Shriram
大脑如何学习并使决策过程成为可能的一个关键方面是通过突触相互作用。突触网络中的电传递和通讯是由离子化学梯度产生的细胞外电场调节的。在合成网络中模拟这样的空间相互作用可能对神经形态学学习和人工智能的硬件实现有潜在的用途。在这里，我们证明了在掺氢钙钛矿镍酸盐设备的网络中，单个结上的电偏置可以调节相邻细胞之间的耦合强度。电输运测量和空间分辨衍射和纳米探针X射线和扫描微波阻抗谱研究表明，氢掺杂镍酸盐薄膜的不均匀介质中的梯度质子分布使这种行为。我们进一步证明了通过耦合的各种路口signalintegration。
A key aspect of how the brain learns and enables decision-makingprocesses is through synaptic interactions. Electrical transmissionand communication in a network of synapses are modulated by extracellularfields generated by ionic chemical gradients. Emulating such spatialinteractions in synthetic networks can be of potential use for neuromorphiclearning and the hardware implementation of artificial intelligence.Here, we demonstrate that in a network of hydrogen-doped perovskitenickelate devices, electric bias across a single junction can tunethe coupling strength between the neighboring cells. Electrical transportmeasurements and spatially resolved diffraction and nanoprobe X-rayand scanning microwave impedance spectroscopic studies suggest thatgraded proton distribution in the inhomogeneous medium of hydrogen-dopednickelate film enables this behavior. We further demonstrate signalintegration through the coupling of various junctions.