Abstract: The use of ultrashort optical and X-ray pulses offers new opportunities to study fundamental interactions in materials exhibiting unconventional quantum states, such as stripes, charge density waves and high-temperature superconductivity. In this talk I will first review recent results produced at the LCLS in this field. I will then focus on ultrafast resonant X-ray scattering experiments on YBa2Cu3O6+x single crystals. Ultrashort infrared pulses produce a non-thermal quench of the superconducting state while X-ray pulses detect the reaction of the charge density waves. At low fluences a transient enhancement of charge density waves is observed, directly revealing the interaction between the two order parameters on their natural timescales.
Biosketch: Giacomo Coslovich has spent his career studying complex materials using ultrafast lasers. He did his graduate research at the University of Trieste, Italy, receiving his PhD in 2011. He then took up a postdoctoral position at Lawrence Berkeley National Laboratory. In 2015, he became a staff scientist at SLAC, where he studies high-temperature superconductors using SLAC’s LCLS X-ray laser.
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2020-02-27T14:00:002020-02-27T15:00:00CM Seminar : Ultrafast Resonant X-ray Scattering on Quantum Materials at LCLS Event Information:
Abstract: The use of ultrashort optical and X-ray pulses offers new opportunities to study fundamental interactions in materials exhibiting unconventional quantum states, such as stripes, charge density waves and high-temperature superconductivity. In this talk I will first review recent results produced at the LCLS in this field. I will then focus on ultrafast resonant X-ray scattering experiments on YBa2Cu3O6+x single crystals. Ultrashort infrared pulses produce a non-thermal quench of the superconducting state while X-ray pulses detect the reaction of the charge density waves. At low fluences a transient enhancement of charge density waves is observed, directly revealing the interaction between the two order parameters on their natural timescales.
Biosketch: Giacomo Coslovich has spent his career studying complex materials using ultrafast lasers. He did his graduate research at the University of Trieste, Italy, receiving his PhD in 2011. He then took up a postdoctoral position at Lawrence Berkeley National Laboratory. In 2015, he became a staff scientist at SLAC, where he studies high-temperature superconductors using SLAC’s LCLS X-ray laser.
Event Location:
Brimacombe 311