Speaker
Denys Sutter
(University of Zurich)
Description
Ca$_2$RuO$_4$ is an archetypal example for multi-band Mott physics including spin-orbit and Hund's coupling. For decades, the mechanism underlying its Mott insulating state has remained elusive. This talk will present the complete low-energy ruthenium band structure as observed by ARPES in the paramagnetic insulating state of Ca$_2$RuO$_4$ . These results suggest that Ca$_2$RuO$_4$ is a unique example of an orbital differentiated conventional band and Mott insulator. The talk we make a strong effort to explain how this conclusion is reached independently from both DMFT calculations and a purely phenomenological DFT model.
Author
Denys Sutter
(University of Zurich)
Co-authors
Mrs
Claudia Fatuzzo
(EPFL)
Dr
Simon Moser
(Advanced Light Source)
Dr
Minjae Kim
(CNRS, Univ Paris-Saclay)
Dr
Rosalba Fittipaldi
(CNR-SPIN)
Dr
Antonio Vecchione
(CNR-SPIN)
Dr
Veronica Granata
(CNR-SPIN)
Dr
Yasmine Sassa
(Uppsala University)
Mr
Fabio Cossalter
(University of Zurich)
Mr
Gianmarco Gatti
(EPFL)
Prof.
Henrik Rønnow
(Ecole Polytechnique Federale de Lausanne, Laboratory for Quantum Magnetism, Lausanne, Switzerland)
Mr
Nicholas Plumb
(PSI)
Dr
Christian Matt
(University of Zurich)
Prof.
Ming Shi
(PSI)
Dr
Moritz Hoesch
(Diamond Light Source)
Dr
Timur Kim
(Diamond Light Source)
Dr
Tay-Rong Chang
(National Tsing Hua University)
Prof.
Horng-Tay Jeng
(National Tsing Hua University)
Dr
Chris Jozwiak
(Advanced Light Source)
Dr
Aaron Bostwick
(Advanced Light Source)
Prof.
Eli Rotenberg
(Advanced Light Source)
Prof.
Antoine Georges
(CNRS Univ Paris-Saclay, University of Geneva)
Prof.
Titus Neupert
(University of Zurich)
Prof.
Johan Chang
(University of Zurich)
