When:
October 21, 2019 @ 11:00 am – 12:00 pm
2019-10-21T11:00:00-05:00
2019-10-21T12:00:00-05:00

“Interaction-Driven Phase Transitions in Symmetry Broken CDW Systems Studied by Ultrafast Electron Diffraction”, Faran Zhou, Michigan State University, Monday, October 21, Bldg 432, Conference Room

Abstract:
Spontaneous symmetry breaking process results in the formation of broken-symmetry states like superconductivity, ferromagnetism and charge-density wave. This broken-symmetry state is usually energetically preferred ground state of matter at low temperatures. With a femtosecond laser pulse excitation, a natural result is the excitation of electrons and subsequent lattice heating, which would suppress the ordered broken-symmetry states. For example, it’s common to observe the ultrafast melting of a ferromagnetic order or charge density wave, but very rare to see the other way around — light induced new symmetry broken states like superconductivity. In this talk, I’ll present a case where we observed light induced CDW in CeTe3.