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One example is a topological insulator (TI) state and its functionality driven by the Coulomb repulsion rather than a spin-orbit coupling. Here, we report a \u2018correlation-driven\u2019 TI state realized in an organic zero-gap system \u03b1-(BETS)\n                    <jats:sub>2<\/jats:sub>\n                    I\n                    <jats:sub>3<\/jats:sub>\n                    . The topological surface state and chiral anomaly are observed in temperature and field dependences of resistance, indicating a three-dimensional TI state at low temperatures. Moreover, we observe a topological phase switching between the TI state and non-equilibrium Dirac semimetal state by a dc current, which is a unique functionality of a correlation-driven TI state. Our findings demonstrate that correlation-driven TIs are promising candidates not only for practical electronic devices but also as a field for discovering new topological phenomena and phases.\n                  <\/jats:p>","DOI":"10.1038\/s41467-023-37293-3","type":"journal-article","created":{"date-parts":[[2023,4,20]],"date-time":"2023-04-20T11:00:46Z","timestamp":1681988446000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Correlation-driven organic 3D topological insulator with relativistic fermions"],"prefix":"10.1038","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5367-2965","authenticated-orcid":false,"given":"Tetsuya","family":"Nomoto","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9870-3596","authenticated-orcid":false,"given":"Shusaku","family":"Imajo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroki","family":"Akutsu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6783-6430","authenticated-orcid":false,"given":"Yasuhiro","family":"Nakazawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0149-704X","authenticated-orcid":false,"given":"Yoshimitsu","family":"Kohama","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,4,20]]},"reference":[{"key":"37293_CR1","doi-asserted-by":"publisher","first-page":"226801","DOI":"10.1103\/PhysRevLett.95.226801","volume":"95","author":"CL Kane","year":"2005","unstructured":"Kane, C. 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