8/26：Seminar Information,　Prof. William Sacks (Sorbonne University)

Title: Cuprate superconductivity: can low-temperature experiments help us find the mechanism?
Speaker: Prof. William Sacks (Sorbonne University)
Date and Time: August 26th (Tue.) 13:30-15:00
Place: Collaboration room (Collaboration building 3F)

Keywords: cuprate superconductivity, pseudogap phenomena, low-temperature experiments, theoretical model

Abstract:
Many experiments investigating hole-doped cuprates, such as resistivity, susceptibility, and specific heat, have concentrated on physical properties as a function of temperature. However, these experiments encounter challenges due to simultaneous thermal excitations (fluctuations, paramagnons, phonons, etc.).
In this talk, we will focus on low-temperature experiments that reveal fundamental parameters such as the energy gap, the coherence length, the vortex core and the upper critical field [1]. By re-examining ARPES and tunneling results we will demonstrate that the ‘pairon’ model [2] of cuprate superconductivity offers a cogent and accurate picture.
I will do my very best to make the talk accessible to a wide audience, including students, researchers, and professors outside of the field.

[1] Magnetic phase diagram of cuprates and universal scaling laws,
Y Noat, A Mauger, W Sacks, Physics Letters A, 544, 130460 (2025).
[2] Cooper pairs without “glue” in high-Tc superconductors: A universal phase diagram,
W Sacks, A Mauger, Y Noat, Europhysics Letters 119, 17001 (2017).