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Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2026,8,25]]},"abstract":"<jats:p>\n                    Layered van der Waals magnetic semiconductors provide a versatile platform for exploring excitonic phenomena intertwined with spin and lattice degrees of freedom, enabling excitons to act as sensitive probes of magnetic order. CrPS\n                    <jats:sub>4<\/jats:sub>\n                    is a layered antiferromagnetic semiconductor that hosts rich excitonic features whose microscopic origin and connection to magnetic ordering remain incompletely understood. Here, we investigate the electronic and excitonic properties of bulk CrPS\n                    <jats:sub>4<\/jats:sub>\n                    using a combination of many-body perturbation theory, dynamical mean-field theory, and photoluminescence-based experiments. Our calculations establish CrPS\n                    <jats:sub>4<\/jats:sub>\n                    as a direct-gap semiconductor with a bandgap of 2.48 eV in the antiferromagnetic phase. Several subbandgap excitonic transitions are predicted by theory, comprising multiple spin-allowed excitons and an additional spin-flip excitation, predominantly localized on the Cr\n                    <jats:sup>3+<\/jats:sup>\n                    ions. Temperature- and magnetic-field-dependent optical measurements reveal thermally driven exciton redistribution among localized states and identify characteristic energy shifts that provide clear optical signatures of magnetic phase transitions in CrPS\n                    <jats:sub>4<\/jats:sub>\n                    . These results provide insights into the excitonic transitions of antiferromagnets and suggest potential routes for all-optical sensing and light-driven control of their magnetic order.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2616584123","type":"journal-article","created":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T19:03:46Z","timestamp":1786993426000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":0,"title":["Manipulation of localized excitons in CrPS\n                    <sub>4<\/sub>\n                    by temperature and magnetic field"],"prefix":"10.1073","volume":"123","author":[{"given":"Dipankar","family":"Jana","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/01tgyzw49","id-type":"ROR","asserted-by":"publisher"}],"name":"Institute for Functional Intelligent Materials, National University of Singapore","place":["Singapore, 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