{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T20:32:02Z","timestamp":1772137922180,"version":"3.50.1"},"reference-count":64,"publisher":"IOP Publishing","issue":"4","license":[{"start":{"date-parts":[[2022,10,28]],"date-time":"2022-10-28T00:00:00Z","timestamp":1666915200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2022,10,28]],"date-time":"2022-10-28T00:00:00Z","timestamp":1666915200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"funder":[{"name":"CSC China Scholarship"},{"name":"Ubbo Emmius Funds, University of Groningen"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["Neuromorph. Comput. Eng."],"published-print":{"date-parts":[[2022,12,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The discovery of ferroelectricity in HfO\n                    <jats:sub>2<\/jats:sub>\n                    -based thin films brings tremendous opportunities for emerging ferroelectric memories as well as for synaptic devices. The origin of ferroelectricity in this material is widely attributed to the presence of a polar orthorhombic phase. However, a new ferroelectric rhombohedral phase displaying large polarization with no need of pre-cycling, has more recently been reported in epitaxial Hf\n                    <jats:sub>0.5<\/jats:sub>\n                    Zr\n                    <jats:sub>0.5<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    (HZO). In this work, the switching mechanism of the rhombohedral phase of HZO films is characterized by a two-stage process. In addition, the synaptic behaviour of this phase is presented, comparing it with previous reports on orthorhombic or non-epitaxial films. Unexpected similarities have been found between these structurally distinct systems. Even though the epitaxial films present a larger coercive field, the ration between the activation field for intrinsic polarization switching and the coercive field (\n                    <jats:italic>F<\/jats:italic>\n                    <jats:sub>a<\/jats:sub>\n                    \/\n                    <jats:italic>E<\/jats:italic>\n                    <jats:sub>c<\/jats:sub>\n                    ) has been found to be close to 2, in agreement with that reported for other hafnia samples. This is about 5 times smaller than in most other ferroelectrics, confirming this characteristic as a unique feature of hafnia-based ferroelectrics.\n                  <\/jats:p>","DOI":"10.1088\/2634-4386\/ac970c","type":"journal-article","created":{"date-parts":[[2022,10,3]],"date-time":"2022-10-03T18:17:39Z","timestamp":1664821059000},"page":"044007","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":17,"title":["Synaptic behaviour in ferroelectric epitaxial rhombohedral Hf\n                    <sub>0.5<\/sub>\n                    Zr\n                    <sub>0.5<\/sub>\n                    O\n                    <sub>2<\/sub>\n                    thin films"],"prefix":"10.1088","volume":"2","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2037-4440","authenticated-orcid":true,"given":"Yingfen","family":"Wei","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3446-9881","authenticated-orcid":false,"given":"Gaurav","family":"Vats","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8456-2286","authenticated-orcid":false,"given":"Beatriz","family":"Noheda","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"266","published-online":{"date-parts":[[2022,10,28]]},"reference":[{"key":"nceac970cbib1","doi-asserted-by":"publisher","first-page":"255","DOI":"10.1038\/s41586-021-04362-w","article-title":"Brain-inspired computing needs a master plan","volume":"604","author":"Mehonic","year":"2022","journal-title":"Nature"},{"key":"nceac970cbib2","doi-asserted-by":"publisher","DOI":"10.1088\/2634-4386\/abf151","article-title":"Towards a generalized theory comprising digital, neuromorphic and unconventional computing","volume":"1","author":"Jaeger","year":"2021","journal-title":"Neuromorph. 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