Speaker
Brigitte Decrausaz
(UZH)
Description
Correlated materials often exhibit co-existing or competing quantum phases. An open question is whether the dominant phase eliminates the other one prior to its emergence. Here, I present a high resolution time-of-flight neutron spectroscopy study on the low-energy incommensurate spin excitations of superconducting $La_{1.855}Sr_{0.145}CuO_{4}$. We find that the spin excitations observed above the superconducting transition temperature are suppressed by the emergence of a superconducting spin gap. Our results suggest that a dynamic competition between superconductivity and magnetism impedes the condensation of the spin-density wave fluctuations.
Author
Brigitte Decrausaz
(UZH)
Co-authors
Daniel Mazzone
Johan Chang
