BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//The Advanced Science Research Center - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:The Advanced Science Research Center
X-ORIGINAL-URL:https://asrc.gc.cuny.edu
X-WR-CALDESC:Events for The Advanced Science Research Center
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20250309T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20251102T060000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20260308T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20261101T060000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20270314T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20271107T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20260521T100000
DTEND;TZID=America/New_York:20260521T110000
DTSTAMP:20260523T223558
CREATED:20260325T182118Z
LAST-MODIFIED:20260427T174354Z
UID:10001568-1779357600-1779361200@asrc.gc.cuny.edu
SUMMARY:Photonics Initiative Seminar: Hari Padma
DESCRIPTION:Dr. Hari Padma\, Case Western Reserve University\nDecoding light-driven quantum materials\nAbstract: Driving quantum materials with intense optical pulses offers a powerful means to control their behavior\, leading to remarkable emergent phenomena such as photoinduced magnetic\, ferroelectric\, and superconducting phases. However\, such phenomena are usually transient\, limited to the sub-picosecond duration of the optical pulse or decaying shortly thereafter. Advancing the design and control of light-driven quantum materials therefore requires targeted strategies to achieve long-lived\, metastable phases. In this talk\, I will describe how symmetry protection leads to electronic metastability in a prototypical cuprate ladder material\, Sr14Cu24O41. This finding is enabled by femtosecond resonant x-ray spectroscopy\, which provides unprecedented access to correlated electronic phenomena far from equilibrium. Our measurements show that the metastability is driven by a transfer of holes from chain-like charge reservoirs into the ladders. This ultrafast charge redistribution arises from the optical dressing and activation of a hopping pathway that is otherwise forbidden by symmetry. Relaxation back to equilibrium is hence suppressed once the optical pulse ceases. Remarkably\, we find that this trapped nonequilibrium electronic distribution hosts a propagating\, collective charge mode that is absent at equilibrium\, representing a possible precursor to superconducting pairing. Our results demonstrate how dressing quantum materials with electromagnetic fields can provide a rational design strategy for nonequilibrium phases of matter. \n\nPadma\, et al. Symmetry-protected electronic metastability in an optically driven cuprate ladder\, Nature Materials 24\, 1584 (2025)\nPadma\, et al. A light-induced charge order mode in a metastable cuprate ladder\, arXiv:2510.24686 (2025)\n\nBio: Hari Padma is an experimental condensed matter physicist and the Frederick Reines Assistant Professor of Physics at Case Western Reserve University. Prior to joining the faculty at Case in 2026\, he was a Postdoctoral Fellow in the Department of Physics at Harvard University. He earned his Ph.D. in Materials Science and Engineering from Penn State University in 2021. His research addresses fundamental problems in quantum materials\, with a focus on probing and controlling nonequilibrium electronic phases using advanced ultrafast optical and x-ray techniques. \nZoom ID 823 5514 7219 Passcode 906987 \n2026 05 21 Photonics Seminar flier
URL:https://asrc.gc.cuny.edu/event/photonics-initiative-seminar-hari-padma/
LOCATION:ASRC Auditorium\, 85 St. Nicholas Terrace\, New York\, NY\, 10031\, United States
CATEGORIES:Photonics
END:VEVENT
END:VCALENDAR