{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T02:29:17Z","timestamp":1773368957943,"version":"3.50.1"},"reference-count":82,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T00:00:00Z","timestamp":1773273600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Since the discovery of iron-based superconductors nearly two decades ago, significant advancements have been made, including the enhancement of the superconducting transition temperature (Tc) to above 100 K. However, the underlying pairing mechanism remains an unresolved enigma. In this article, we present experimental developments in iron-based superconductors, focusing on their unique properties and the complexities involved in their behavior. We discuss the recently announced electron\u2013differential phonon coupling model, which aims to provide a framework to calculate the Tc of iron-based superconductors, but raises questions about its applicability to all iron-based superconductors. We selectively analyze several compounds within the major iron-based families to assess their compatibility with the electron\u2013differential phonon coupling model. By comparing experimental data with theoretical predictions, we identify which superconductors align with the model and which do not. Furthermore, our findings reveal several key reasons behind the discrepancies in calculating Tc for those iron-based materials that fall outside the theoretical expectations. Despite this, the pairing mechanism of iron-based superconductors remains an open question.<\/jats:p>","DOI":"10.3390\/ma19061105","type":"journal-article","created":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T14:46:31Z","timestamp":1773326791000},"page":"1105","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Advances in Iron-Based Superconductors and Transformational Insights into Electron\u2013Differential Phonon Coupling"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-3485-1512","authenticated-orcid":false,"given":"Wai Kwan","family":"Liu","sequence":"first","affiliation":[{"name":"Laboratory of Materials for Renewable Energy (LMER), Institute of Chemical Sciences and Engineering (ISIC), Basic Science Faculty (SB), \u00c9cole Polytechnique F\u00e9d\u00e9rale de Lausanne (EPFL), CH-1950 Sion, Switzerland"},{"name":"EMPA Materials Science and Technology, CH-8600 Dubendorf, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ka Chun","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Hong Kong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yanling","family":"Zhang","sequence":"additional","affiliation":[{"name":"Division of Science, Engineering, and Health Studies, The School of Professional Education and Executive Development, The Hong Kong Polytechnic University, Hong Kong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6026-0600","authenticated-orcid":false,"given":"Chi Ho","family":"Wong","sequence":"additional","affiliation":[{"name":"Division of Science, Engineering, and Health Studies, The School of Professional Education and Executive Development, The Hong Kong Polytechnic University, Hong Kong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,12]]},"reference":[{"key":"ref_1","unstructured":"Japan Science and Technology Agency (2026, February 03). 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