Chargement de la carte…
Topological insulating phase in the molecular compound $mathrm{Mo_3 S_7 (dmit)_3}$
Ian McCulloch (University of Queensland, Australie)
Using the infinite-size density matrix renormalization group (iDMRG) approach, we show that a Hubbard-like model on a triangular cluster, representative of the compound $mathrm{Mo_3 S_7 (dmit)_3}$, is in the universally class of the symmetry-protected topological 1D Haldane insulator, despite the presence of itinerant fermions which would normally destroy the symmetry protection. I will also illustrate a new technique, to calculate cumulant expansions of order parameters using iDMRG, which gives detailed information on quantum phase transitions and has many potential uses, eg full-counting statistics through a quantum quench.