BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:iCalendar-Ruby BEGIN:VEVENT CATEGORIES:Lectures & Presentations DESCRIPTION:The Physics & Astronomy Colloquium Series presents Matteo Mitra no of Harvard\, discussing "Driven Quantum Materials under the X-ray Spotli ght" on April 21.\n\n \n\nAbstract: Ultrafast optical excitation\, especial ly when resonant to specific lattice modes\, has recently emerged as a powe rful means to control and induce new functionalities in quantum materials. One of the most ambitious goals is to selectively drive structural or elect ronic degrees of freedom to bring about nonequilibrium superconductivity at temperatures far above the equilibrium critical temperature Tc. While this phenomenon has been observed in a variety of systems ranging from copper o xides to organic molecular metals\, the microscopic physics of these dynami cs is still largely unexplored. Novel ultrafast x-ray spectroscopic methods \, such as time-resolved x-ray absorption (trXAS) and time-resolved resonan t inelastic x-ray scattering (trRIXS)\, enable tackling this problem with u nprecedented detail. \n\n \n\nBy focusing on the paradigmatic example of li ght-driven La2-xBaxCuO4\, I will show how trRIXS provides access to the fin ite-momentum charge fluctuation spectrum of these transient phases [1\,2\,3 ]. I will then discuss how changes of the electronic structure translate in to a modification of the finite-momentum spin fluctuation spectrum [4] and\ , finally\, how the dynamics of the effective electronic interactions in th e CuO2 plane can be accurately quantified via trXAS [5].\n\n \n\n[1] M. Mitrano\, et al.\, Sci. Adv. 5\, eaax3346 (2019).\n\n[2] M. Mitr ano\, et al.\, Phys. Rev. B 100\, 205125 (2019).\n\n[3] M Mitrano & Y. Wang\, Commun. Phys. 3\, 184 (2020).\n\n[4] Y. Wang\, et al.\, Co mmun. Phys. 4\, 212 (2021).\n\n[5] D. R. Baykusheva\, et al.\, Phys. Rev. X 12\, 011013 (2022). DTEND:20230421T210000Z DTSTAMP:20240921T074316Z DTSTART:20230421T201000Z GEO:39.322732;-82.10287 LOCATION:Walter Hall\, 145 SEQUENCE:0 SUMMARY:Physics Colloquium | Driven Quantum Materials under the X-ray Spotl ight\, April 21 UID:tag:localist.com\,2008:EventInstance_42101316093263 URL:https://calendar.ohio.edu/event/physics_colloquium_condensed_matter_apr il_21 END:VEVENT END:VCALENDAR