2023/10/26(Thu)
10:00 -12:00
五樓第一會議室 5F, 1st Meeting Room
視訊演講 Video Seminar [ Meeting Link / ID: 2510 933 6227 / Password: 123456 ]
Title
Ultrafast Raman thermometry in optically driven YBa2Cu3O6.48
Speaker
周廷翰先生 (Max Planck Institute for the Structure and Dynamics of Matter) Mr. Ting-Han Chou (Max Planck Institute for the Structure and Dynamics of Matter)Abstract
Resonant phonon driving in the underdoped cuprate YBa2Cu3O6.48 was shown to induce superconducting coherence far above the equilibrium critical temperature. A “cold” superfluid was extracted from the transient terahertz conductivity and was seen to coexist with “hot” uncondensed quasi-particles. The interplay between coherent and incoherent responses in such a driven-dissipative system is not well understood. In this talk, I will report time-resolved spontaneous Raman experiments studying the lattice temperature in the photo-induced superconducting state in YBa2Cu3O6.48. This is to be compared with the electron (quasi-particle) temperature revealed by the terahertz spectroscopy. These results provide quantitative information on the nature of the driven superconducting state and its decay.
Language
演講語言 (Language): in English