Speaker
Jose Abraham Hernandez Sanchez
Description
Enhanced quantum fluctuations are believed to give rise to new ground states and magnetic excitations in electronic insulators. I will present the effect of strong quantum fluctuations in the honeycomb van der Waals antiferromagnet YbBr3. Quantum fluctuations are believed to be enhanced in YbBr3 due to the two-dimensional nature of the exchange interactions. The low-energy spin dynamics of the system measured with inelastic neutron scattering are excellently reproduced by the spin-½ Heisenberg model treated with the matrix-product states (MPS) numerical method. The coexistence of magnon-like and continuum excitations are spectacularly reproduced by the method.
Author
Jose Abraham Hernandez Sanchez
Co-authors
Bertrand Roessli
K. W. Krämer
Michael Schüler
(Paul Scherrer Institute / University of Fribourg)
A. A. Eberharter
Bruce Normand
Andreas M. Läuchli
Michel Kenzelmann
(Paul Scherrer Insitut, Laboratory for Neutron Scattering & Imaging)
