Publications (5)
Characteristic Timescales of the Local Moment Dynamics in Hund's-metals
C. Watzenböck, M. Edelmann, D. Springer +2
We study the characteristic time scales of the fluctuating local moments in Hund's metal systems for different degrees of correlation. By analyzing the dynamical spin susceptibilit…
Doping dependence of the electron-phonon and electron-spin fluctuation interactions in the high- superconductor BiSrCaCuO
Elbert E. M. Chia, D. Springer, Saritha K. Nair +9
Using ultrafast optical techniques, we detect two types of bosons strongly coupled to electrons in the family of BiSrCaCuO from the underdoped to overdop…
Interfacial effects revealed by ultrafast relaxation dynamics in BiFeO/YBaCuO bilayers
D. Springer, Saritha K. Nair, Mi He +6
The temperature dependence of the relaxation dynamics in the bilayer thin film heterostructure composed of multiferroic BiFeO (BFO) and superconducting YBaCuO$_{7…
Attractive effect of a strong electronic repulsion -- the physics of vertex divergences
M. Reitner, P. Chalupa, L. Del Re +4
While the breakdown of the perturbation expansion for the many-electron problem has several formal consequences, here we unveil its physical effect: Flipping the sign of the effect…
Interplay between local response and vertex divergences in many-fermion systems with on-site attraction
D. Springer, P. Chalupa, S. Ciuchi +2
We investigate the divergences appearing in the two-particle irreducible vertex functions of many-fermion systems with attractive on-site interactions. By means of dynamical mean-f…