{"id":108563,"date":"2020-06-12T00:42:26","date_gmt":"2020-06-12T07:42:26","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2020\/06\/alloying-conducting-channels-for-reliable-neuromorphic-computing"},"modified":"2020-06-12T00:42:26","modified_gmt":"2020-06-12T07:42:26","slug":"alloying-conducting-channels-for-reliable-neuromorphic-computing","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2020\/06\/alloying-conducting-channels-for-reliable-neuromorphic-computing","title":{"rendered":"Alloying conducting channels for reliable neuromorphic computing"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/alloying-conducting-channels-for-reliable-neuromorphic-computing.jpg\"><\/a><\/p>\n<p>A memristor<sup><a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 1\" title=\"Strukov, D. B., Snider, G. S., Stewart, D. R. & Williams, R. S. The missing memristor found. Nature 453, 80&ndash;83 (2008).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR1\" id=\"ref-link-section-d105514e547\">1<\/a><\/sup> has been proposed as an artificial synapse for emerging neuromorphic computing applications<sup><a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 2\" title=\"Xia, Q. & Yang, J. J. Memristive crossbar arrays for brain-inspired computing. Nat. Mater. 18, 309&ndash;323 (2019).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR2\" id=\"ref-link-section-d105514e551\">2<\/a>,<a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 3\" title=\"Burr, G. W. et al. Neuromorphic computing using non-volatile memory. Adv. Phys. X 2, 89&ndash;124 (2017).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR3\" id=\"ref-link-section-d105514e554\">3<\/a><\/sup>. To train a neural network in memristor arrays, changes in weight values in the form of device conductance should be distinct and uniform<sup><a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 3\" title=\"Burr, G. W. et al. Neuromorphic computing using non-volatile memory. Adv. Phys. X 2, 89&ndash;124 (2017).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR3\" id=\"ref-link-section-d105514e558\">3<\/a><\/sup>. An electrochemical metallization (ECM) memory<sup><a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 4\" title=\"Valov, I., Waser, R., Jameson, J. R. & Kozicki, M. N. Electrochemical metallization memories&mdash;fundamentals, applications, prospects. Nanotechnology 22, 254003 (2011).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR4\" id=\"ref-link-section-d105514e562\">4<\/a>,<a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 5\" title=\"L\u00fcbben, M. & Valov, I. Active electrode redox reactions and device behavior in ECM type resistive switching memories. Adv. Electron. Mater. 5, 1800933 (2019).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR5\" id=\"ref-link-section-d105514e565\">5<\/a><\/sup>, typically based on silicon (Si), has demonstrated a good analogue switching capability<sup><a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 6\" title=\"Jo, S. H. et al. Nanoscale memristor device as synapse in neuromorphic systems. Nano Lett. 10, 1297&ndash;1301 (2010).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR6\" id=\"ref-link-section-d105514e569\">6<\/a>,<a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 7\" title=\"Choi, S. et al. SiGe epitaxial memory for neuromorphic computing with reproducible high performance based on engineered dislocations. Nat. Mater. 17, 335&ndash;340 (2018).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR7\" id=\"ref-link-section-d105514e572\">7<\/a><\/sup> owing to the high mobility of metal ions in the Si switching medium<sup><a data-track=\"click\" data-track-action=\"reference anchor\" data-track-label=\"link\" data-test=\"citation-ref\" aria-label=\"Reference 8\" title=\"Yang, Y. et al. Observation of conducting filament growth in nanoscale resistive memories. Nat. Commun. 3, 732&ndash;738 (2012).\" href=\"https:\/\/www.nature.com\/articles\/s41565-020-0694-5#ref-CR8\" id=\"ref-link-section-d105514e577\">8<\/a><\/sup>. However, the large stochasticity of the ion movement results in switching variability. Here we demonstrate a Si memristor with alloyed conduction channels that shows a stable and controllable device operation, which enables the large-scale implementation of crossbar arrays. The conduction channel is formed by conventional silver (Ag) as a primary mobile metal alloyed with silicidable copper (Cu) that stabilizes switching. In an optimal alloying ratio, Cu effectively regulates the Ag movement, which contributes to a substantial improvement in the spatial\/temporal switching uniformity, a stable data retention over a large conductance range and a substantially enhanced programmed symmetry in analogue conductance states. This alloyed memristor allows the fabrication of large-scale crossbar arrays that feature a high device yield and accurate analogue programming capability. Thus, our discovery of an alloyed memristor is a key step paving the way beyond von Neumann computing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A memristor1 has been proposed as an artificial synapse for emerging neuromorphic computing applications2,3. To train a neural network in memristor arrays, changes in weight values in the form of device conductance should be distinct and uniform3. An electrochemical metallization (ECM) memory4,5, typically based on silicon (Si), has demonstrated a good analogue switching capability6,7 owing [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,6],"tags":[],"class_list":["post-108563","post","type-post","status-publish","format-standard","hentry","category-chemistry","category-robotics-ai"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/108563","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=108563"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/108563\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=108563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=108563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=108563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}