1209.2255 (Stefan Rist et al.)

Photoemission spectra of massless Dirac fermions on the verge of exciton
condensation    [PDF]

Stefan Rist, A. A. Varlamov, A. H. MacDonald, Rosario Fazio, Marco Polini

Angle-resolved photoemission spectroscopy (ARPES) is a powerful probe of electron correlations in two-dimensional layered materials. In this Letter we demonstrate that ARPES can be used to probe the onset of exciton condensation in spatially-separated systems of electrons and holes created by gating techniques in either double-layer graphene or topological-insulator thin films.

View original: http://arxiv.org/abs/1209.2255