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X-WR-CALNAME:LASSP/AEP Seminar: Xiaoyang Zhu (Columbia)
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260810T165200Z
UID:tag:localist.com\,2008:EventInstance_50595667850054
DTSTART:20251007T162000Z
DTEND:20251007T171000Z
DESCRIPTION:Optical Probes of Correlated Electrons\, Spins\, and Dipoles\n\
 nCorrelation plays a central role in emergent phenomena. Examples include\
 , among others\, quantum ground states and collective excitations. Here\, 
 I will discuss what we can learn from time-domain views of correlation in 
 two dimensional (2D) van der Waals (vdW) materials. In the 2D vdW magnetic
  semiconductor\, CrSBr\, excitonic transition is found to strongly couple 
 to magnetic order [1] and this allows the easy detection of low energy (GH
 z-THz) magnons by visible-NIR light [2]. In twisted bilayer MoTe2\, we app
 ly pump-probe spectroscopy as hitherto the most sensitive probe of electro
 n correlation in moiré quantum matter [3] to discover a zoo of quantum ph
 ases at fractional fillings in moiré super-lattices [4]. In the 2D vdW ma
 gnetic semiconductor\, NbOI2 [5]\, we report the experimental discovery of
  a quasi-particle\, the ferron\, which may form the basis for new modes of
  information processing and control [6].\n\n[1] Nature Mater. 2021\, 20\, 
 1657-1663.\n[2] Nature 2022\, 609\, 282-286.\n[3] Phys. Rev. Lett. 2024\, 
 132\, 126501.\n[4] Nature 2025\, 641\, 1149-1155.\n[5] Nature Mat. 2025\, 
 24\, 1203-1208.\n[6] arXiv preprint 2025\, https://arxiv.org/abs/2505.2255
 9.\n \n\nBio: Xiaoyang Zhu is the Howard Family Professor of Nanoscience a
 nd a professor of chemistry at Columbia University. He received a B.S. deg
 ree from Fudan University in 1984 and a Ph.D. from the University of Texas
  at Austin in 1989. After doing postdoctoral research with Gerhard Ertl at
  the Fritz-Haber-Institute\, he joined the faculty at Southern Illinois Un
 iversity as an assistant professor in 1993. In 1997\, he moved to the Univ
 ersity of Minnesota as a tenured associate professor\, later a full profes
 sor\, and a Merck endowed professor. In 2009\, he returned to the Universi
 ty of Texas at Austin as the Vauquelin Regents Professor and served as dir
 ector of the DOE Energy Frontier Research Center and the Center for Materi
 als Chemistry. In 2013\, he moved to Columbia University. His honors inclu
 de a Dreyfus New Faculty Award\, a Cottrell Scholar Award\, a Friedrich Wi
 lhelm Bessel Award\, APS Fellow\, a Vannevar Bush Faculty Fellow Award fro
 m DOD\, an Ahmed Zewail Award from the American Chemical Society\, and an 
 APS Earle K. Plyler Prize. Among his professional activities\, he serves o
 n the editorial/advisory boards of Science Advances\, Chemical Physics\, a
 nd Progress in Surface Science\, and as a scientific advisor to the Fritz-
 Haber-Institute of the Max-Planck Society.
GEO:42.449741;-76.481209
LOCATION:Clark Hall\, 700
SUMMARY:LASSP/AEP Seminar: Xiaoyang Zhu (Columbia)
URL;VALUE=URI:https://events.cornell.edu/event/lasspaep-seminar-xiaoyang-zh
 u-columbia
CATEGORIES:Seminar
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