Séminaire du LPTMS: Ian McCulloch

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.

Date/Time : 07/04/2014 - 14:30 - 15:30

Location : LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay

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