{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T17:00:39Z","timestamp":1790787639405,"version":"4.1.0"},"reference-count":46,"publisher":"National Academy of Sciences","issue":"40","license":[{"start":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T00:00:00Z","timestamp":1790726400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2026,10,6]]},"abstract":"<jats:p>\n                    We report observations of a pressure-induced Lifshitz transition coupled with a quantum phase transition in the electron-doped cuprate superconductor Pr\n                    <jats:sub>0.87<\/jats:sub>\n                    LaCe\n                    <jats:sub>0.13<\/jats:sub>\n                    CuO\n                    <jats:sub>4\u00b1\u03b4<\/jats:sub>\n                    , by combining high-pressure electrical resistance, Hall coefficient (\n                    <jats:italic toggle=\"yes\">R<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic toggle=\"yes\">H<\/jats:italic>\n                    <\/jats:sub>\n                    ), and synchrotron X-ray diffraction (XRD) measurements at low temperatures. Our low-temperature Hall coefficient (\n                    <jats:italic toggle=\"yes\">R<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic toggle=\"yes\">H<\/jats:italic>\n                    <\/jats:sub>\n                    ) measurements reveal that the\n                    <jats:italic toggle=\"yes\">R<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic toggle=\"yes\">H<\/jats:italic>\n                    <\/jats:sub>\n                    decreases continuously and reaches zero at ~10 GPa (critical pressure of\n                    <jats:italic toggle=\"yes\">P<\/jats:italic>\n                    <jats:sub>c1<\/jats:sub>\n                    ). Upon further compression beyond\n                    <jats:italic toggle=\"yes\">P<\/jats:italic>\n                    <jats:sub>c1<\/jats:sub>\n                    ,\n                    <jats:italic toggle=\"yes\">R<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic toggle=\"yes\">H<\/jats:italic>\n                    <\/jats:sub>\n                    unexpectedly changes its sign from negative to positive, signaling a reconstruction of the Fermi surface from electron-dominated to hole-dominated topology. Concurrently, the superconducting transition temperature (\n                    <jats:italic toggle=\"yes\">T<\/jats:italic>\n                    <jats:sub>c<\/jats:sub>\n                    ) exhibits a monotonic suppression, vanishing completely at ~17.6 GPa (critical pressure of\n                    <jats:italic toggle=\"yes\">P<\/jats:italic>\n                    <jats:sub>c2<\/jats:sub>\n                    ), where the system enters a nonsuperconducting metallic state. Our low-temperature XRD measurements unequivocally demonstrate the absence of any structural phase transition across\n                    <jats:italic toggle=\"yes\">P<\/jats:italic>\n                    <jats:sub>c1<\/jats:sub>\n                    and\n                    <jats:italic toggle=\"yes\">P<\/jats:italic>\n                    <jats:sub>c2<\/jats:sub>\n                    . Therefore, the sign change in\n                    <jats:italic toggle=\"yes\">R<\/jats:italic>\n                    <jats:sub>\n                      <jats:italic toggle=\"yes\">H<\/jats:italic>\n                    <\/jats:sub>\n                    at\n                    <jats:italic toggle=\"yes\">P<\/jats:italic>\n                    <jats:sub>c1<\/jats:sub>\n                    is associated with a Lifshitz transition, which is never found in the compressed bulk electron- or hole-doped cuprate superconductors. Moreover, the quantum phase transition observed at\n                    <jats:italic toggle=\"yes\">P<\/jats:italic>\n                    <jats:sub>c2<\/jats:sub>\n                    contrasts sharply with known high-pressure behavior of hole-doped cuprates, uncovering a fundamental difference on how pressure tunes the ground states of electron- vs. hole-doped systems. These findings provide crucial insights into the different pressure responses on the interplay among Fermi surface topology, electronic correlations, and superconductivity between these two kinds of cuprate superconductors.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2622416123","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T16:13:32Z","timestamp":1790784812000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":0,"title":["Pressure-induced Lifshitz and quantum phase transitions in electron-doped cuprate superconductors"],"prefix":"10.1073","volume":"123","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5871-6234","authenticated-orcid":false,"given":"Jinyu","family":"Zhao","sequence":"first","affiliation":[{"name":"Center for High Pressure Science & Technology Advanced Research","place":["Beijing, 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M.","year":"1960","unstructured":"I. M. Lifshitz, Anomalies of electron characteristics of a metal in the high pressure region. Sov. Phys. Jetp Ussr 11, 1130\u20131135 (1960).","journal-title":"Sov. Phys. Jetp Ussr"},{"key":"e_1_3_4_39_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.103.024502"},{"key":"e_1_3_4_40_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.2204630119"},{"key":"e_1_3_4_41_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.114.147001"},{"key":"e_1_3_4_42_2","doi-asserted-by":"publisher","DOI":"10.1088\/0256-307X\/36\/1\/017402"},{"key":"e_1_3_4_43_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.92.167001"},{"key":"e_1_3_4_44_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature05437"},{"key":"e_1_3_4_45_2","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.aap7349"},{"key":"e_1_3_4_46_2","unstructured":"J. Zhao Data for \u201cPressure-induced Lifshitz and quantum phase transitions in electron-doped cuprate superconductors\u201d. Figshare. https:\/\/doi.org\/10.6084\/m9.figshare.33876445. Deposited 17 September 2026."}],"container-title":["Proceedings of the National Academy of Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pnas.org\/doi\/pdf\/10.1073\/pnas.2622416123","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T16:14:20Z","timestamp":1790784860000},"score":1,"resource":{"primary":{"URL":"https:\/\/pnas.org\/doi\/10.1073\/pnas.2622416123"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,30]]},"references-count":46,"journal-issue":{"issue":"40","published-print":{"date-parts":[[2026,10,6]]}},"alternative-id":["10.1073\/pnas.2622416123"],"URL":"https:\/\/doi.org\/10.1073\/pnas.2622416123","relation":{},"ISSN":["0027-8424","1091-6490"],"issn-type":[{"value":"0027-8424","type":"print"},{"value":"1091-6490","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,30]]},"assertion":[{"value":"2026-06-24","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-30","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-09-30","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e2622416123"}}