Speaker
Izabela Biało
(University of Zurich)
Description
Manifestations of quantum fluctuations on ground states and their excitations are at the heart of condensed matter physics. Electronic two-dimensional square-lattice systems are in the moderate coupling limit extremely complex. Here, we introduce an ultra-clean half-filled cuprate system with moderate correlation strength. Using high-resolution resonant inelastic x-ray scattering, we probe the magnon excitations and their dispersion. We show that the dispersion is associated with a discontinuous "band" velocity. Within a Heisenberg-Hubbard model, this discontinuity is assigned to the presence of strong quantum fluctuations.
Author
Izabela Biało
(University of Zurich)
Co-authors
Qisi Wang
(The Chinese University of Hong Kong)
Julia Küspert
Karin von Arx
(University of Zurich)
Dr
Chun Lin
(University of Zurich)
Wojciech Radoslaw Pudelko
(Paul Scherrer Institut)
Davide Betto
(European Synchrotron Radiation Facility: Grenoble, FR)
Nicholas Brookes
(European Synchrotron Radiation Facility: Grenoble, FR)
Nicholas Clark Plumb
Kaori Tanaka
Johan Chang
