Past QuMat seminars in Utrecht
The QuMat seminars in Utrecht is a bi-weekly joint venture between Utrecht’s experimental and theoretical condensed matter physics groups.
Coming QuMat seminars are listed here.
Videos from previous talks are available on youtube and listed here.
Fundamental limit on electron-phonon interaction strength in metals
Speaker: Emil Yuzbashyan – Rutgers University
Host: Dirk Schuricht
![[guest]](https://qumat.org/wp-content/uploads/2023/09/Yuzbashyan.jpg)
Abstract:
I’ll show that the dimensionless electron-phonon coupling λ cannot exceed a certain critical value (approximately 3.7) in metals. Increasing λ beyond this value leads to a structural instability accompanied by a metal-insulator transition. This also implies an upper bound on the superconducting Tc. We’ll compare the bounds on λ and Tc with existing experimental data.