Alfred Zong

University of California - Berkeley
Postdoctoral Fellow
Friday, Jan. 13, 2023
3:30pm
Taylor Auditorium - Frick Chemistry Laboratory
Host
Marissa Weichman
Add to Calendar2023-01-13 15:30:002023-01-13 15:30:00Marissa WeichmanTaylor Auditorium - Frick Chemistry Laboratory15YYYY-MM-DD

Pathways toward unconventional light induced states in quantum materials

Phase transitions instigated by an intense, ultrashort laser pulse usher in a new
era for engineering quantum materials at the femto 10 15 to pico second
10 12 s) timescales In this talk, I will discuss two important pathways for
manipulating nonequilibrium phases of matter that feature ( competing orders,
and ( strong electronic interactions More specifically, an ultrashort light pulse
can ( unleash a hidden order that is suppressed in equilibrium due to phase
competition, and ( change the dimensionality of an ordered state by modifying
excitonic correlations I will explain the microscopic mechanisms behind these
unconventional light induced states, highlighting the roles of photoinduced
topological defects, order parameter fluctuation, and carrier screening These
points will be discussed using examples from materials that exhibit a charge
density wave a spontaneous formation of electron density modulation
accompanied by a periodic lattice distortion which serves as a versatile model
system to illustrate general principles underlying ultrafast light matter
interaction in strongly correlated materials