Séminaire (Physique) : Mass and chirality inversion of a Dirac cone pair in Stückelberg interferometry

Lih King Lim, Laboratoire Charles Fabry, Institut d'Optique
Quand ? Le 07-03-2014,
de 11:00 à 12:00
Où ? Institut Nonlinéaire de Nice, 361 routes des Lucioles, Sophia Antipolis, Valbonne
Ajouter un événement au calendrier vCal


The aim of the present work is to show that a Stückelberg interferometer made of two massive Dirac cones can reveal information on band eigenstates such as the chirality and mass sign of the cones. For a given spectrum featuring two gapped cones, we propose several low-energy Hamiltonians differing by their eigenstates properties. The corresponding inter-band transition probability is affected by such differences in its interference fringes being shifted by a new phase of geometrical origin. This phase can be a useful bulk probe for cold atoms in topological optical lattices.