Sunday, August 4, 2013

1308.0281 (Lih-King Lim et al.)

Mass and chirality inversion of a Dirac cone pair in Stückelberg

Lih-King Lim, Jean-Noël Fuchs, Gilles Montambaux
The aim of the present work is to show that a St\"{u}ckelberg 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.
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