{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T13:04:08Z","timestamp":1784898248548,"version":"3.55.0"},"reference-count":45,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T00:00:00Z","timestamp":1784851200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T00:00:00Z","timestamp":1784851200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/100000015","name":"U.S. Department of Energy","doi-asserted-by":"publisher","award":["DE\u2010AC02\u201007CH11358"],"award-info":[{"award-number":["DE\u2010AC02\u201007CH11358"]}],"id":[{"id":"10.13039\/100000015","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Science"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Resolving sub\u201010 nm spin switching and the associated terahertz (THz) electrodynamics during the colossal magnetoresistance (CMR) transition is a definitive frontier in reaching the fundamental spatial, temporal, and energy\u2010dissipation limits of spin\u2010electronics. Yet, simultaneous control of high magnetic field, cryogenic environment, and nanometer resolution has remained an elusive benchmark for THz nanoscopy, leaving the local THz dynamics of these transitions largely unexplored. Here, we overcome these limitations by utilizing a custom\u2010built cryogenic magneto\u2010THz scattering\u2010type scanning near\u2010field optical microscopy (cm\u2010THz\u2010sSNOM) to resolve the near\u2010field THz spectroscopic evolution of the magnetic field\u2010driven CMR transition in a manganite single crystal. Our measurements provide a nanoscale visualization of the THz conductivity, capturing the moment that magnetic\u2010field\u2010induced spin switching triggers the transition from an antiferromagnetic insulator to a ferromagnetic metal. An ellipsoidal near\u2010field model reveals a multi\u2010scale transition initiated by 1\u20132 nm isolated spin\u2010flip sites at low magnetic fields, which coalesce into 15\u00a0nm conducting regions as the threshold field is approached. These results provide an nano\u2010THz view of CMR switching, establishing an analysis framework for mapping spin\u2013charge\u2013lattice\u2013orbit\u2013coupled dynamics at spatial scales that transcend the nominal sSNOM resolution.<\/jats:p>","DOI":"10.1002\/advs.76799","type":"journal-article","created":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T12:31:34Z","timestamp":1784896294000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Terahertz\u2010Nanoscale Visualization of the Microscopic Spin\u2010Charge Architecture of Colossal Magnetoresistive Switching"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4262-5538","authenticated-orcid":false,"given":"Samuel","family":"Haeuser","sequence":"first","affiliation":[{"name":"Department of Physics and Astronomy Iowa State University Ames Iowa USA"},{"name":"Ames National Laboratory of U.S. Department of Energy Ames Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-6368-8918","authenticated-orcid":false,"given":"Randall K.","family":"Chan","sequence":"additional","affiliation":[{"name":"Department of Physics and Astronomy Iowa State University Ames Iowa USA"},{"name":"Ames National Laboratory of U.S. Department of Energy Ames Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4244-9653","authenticated-orcid":false,"given":"Richard H. J.","family":"Kim","sequence":"additional","affiliation":[{"name":"Ames National Laboratory of U.S. Department of Energy Ames Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9936-7512","authenticated-orcid":false,"given":"Joong\u2010Mok","family":"Park","sequence":"additional","affiliation":[{"name":"Ames National Laboratory of U.S. Department of Energy Ames Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2040-3598","authenticated-orcid":false,"given":"Martin","family":"Mootz","sequence":"additional","affiliation":[{"name":"Ames National Laboratory of U.S. Department of Energy Ames Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4960-9266","authenticated-orcid":false,"given":"Thomas","family":"Koschny","sequence":"additional","affiliation":[{"name":"Ames National Laboratory of U.S. Department of Energy Ames Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6159-4119","authenticated-orcid":false,"given":"Jigang","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Physics and Astronomy Iowa State University Ames Iowa USA"},{"name":"Ames National Laboratory of U.S. Department of Energy Ames Iowa USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,24]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"crossref","DOI":"10.1063\/5.0130680","article-title":"A Sub\u20102 Kelvin Cryogenic Magneto\u2010Terahertz Scattering\u2010Type Scanning Near\u2010Field Optical Microscope (cm\u2010THz\u2010sSNOM)","volume":"94","author":"Kim R. 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