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However, nonreciprocity in natural quasi\u2010static mechanical systems, including nonreciprocal bending, has rarely been explored. Here we demonstrate nonreciprocal bending in a freestanding ferroelectric single\u2010crystalline PbTiO\n                    <jats:sub>3<\/jats:sub>\n                    membrane using suspended\u2010membrane nanoindentation. The mechanical bending of the ferroelectric membrane is strongly asymmetric in the two opposite bending directions with a difference in effective elastic modulus of up to 33%. The elastic recovery of bending deformation also becomes polarity\u2010dependent. Such unconventional nonreciprocal bending originates from the asymmetric ferroelectric domain switching driven by the crucial flexoelectricity, as revealed by phase\u2010field simulations. This work enriches the nonreciprocal functionalities of ferroelectrics and presents a route for exploring more nonreciprocal effects by flexoelectric engineering.\n                  <\/jats:p>","DOI":"10.1002\/adma.75369","type":"journal-article","created":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T08:52:09Z","timestamp":1791967929000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Nonreciprocal Bending in Ferroelectric Membranes Driven by Flexoelectricity"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2346-4524","authenticated-orcid":false,"given":"Yingzhuo","family":"Lun","sequence":"first","affiliation":[{"name":"School of Aerospace Engineering Beijing Institute of Technology  Beijing 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Center of Advanced Microstructures Nanjing University  Nanjing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leyan","family":"Nian","sequence":"additional","affiliation":[{"name":"National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures Nanjing University  Nanjing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3839-2030","authenticated-orcid":false,"given":"Songhua","family":"Cai","sequence":"additional","affiliation":[{"name":"Department of Physics and Materials The Hong Kong Polytechnic University  Kowloon Hong Kong"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-5969-0085","authenticated-orcid":false,"given":"Zewei","family":"Hou","sequence":"additional","affiliation":[{"name":"School of Aerospace Engineering Beijing Institute of Technology  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5264-9539","authenticated-orcid":false,"given":"Xueyun","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Aerospace Engineering Beijing Institute of Technology  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9948-9904","authenticated-orcid":false,"given":"Yuefeng","family":"Nie","sequence":"additional","affiliation":[{"name":"National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures Nanjing University  Nanjing 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