2021학년도 2학기 물리학과 세미나를 안내해 드립니다.
• 연사 : 천세환 박사 (XFEL Division, Pohang Accelerator Laboratory)
• 일시 : 2021년 9월 16일 목요일 오후 4시 30분
• 제목 : Ultrafast dynamic phenomena in strongly electron-correlated materials investigated at PAL-XFEL
• 초록 :
X-ray free electron laser (XFEL) is a new generation of x-ray radiation source that opens a gateway to ultrafast dynamic phenomena in materials. This source has extensively contributed to emergence of the new sciences in concert with rapidly developing XFEL experimental techniques based on three key features compared with synchrotron x-ray radiation source: 1) high brightness (>108 times), 2) short x-ray pulse (<10-4 times), and 3) long coherence length (>102 times). PAL-XFEL in South Korea is the third hard x-ray free electron laser in the world and has started the user service since 2017. Its remarkable x-ray beam stability with small timing and pointing jitters provides optimized experimental conditions for optical laser pump and XFEL probe experiment. This pump-probe scheme allows one to access in the time domain, intriguing coupled/decoupled nature among physical degrees of freedom (e.g. lattice, spin, orbital, and charge) in strongly electron-correlated materials. In this seminar, recent research activities at PAL-XFEL focusing on dynamics of crystal and magnetic structures will be introduced.
• 장소 :
온라인: Zoom(Link : https://ssu-ac-kr.zoom.us/j/83265012552 )
많은 참여를 부탁드립니다.