Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 14: Correlated Electrons: Low-Dimensional Systems - Models 2

TT 14.1: Vortrag

Montag, 11. März 2013, 15:00–15:15, H9

Topological parity invariant in interacting two-dimensional systems from quantum Monte Carlo — •Stefan Wessel¹, Thomas Lang¹, Victor Gurarie², and Andrew Essin² — ¹RWTH Aachen, Aachen, Germany — ²University of Colorado, Boulder, USA

We report results on calculating the parity invariant from imaginary-time Green's functions in quantum Monte Carlo simulations of strongly interacting electron systems. The topological invariant is used to study the trivial- to topological-insulator transitions in the Kane-Mele-Hubbard model with an explicit bond dimerization. We explore the accessibility and behavior of this invariant based on quantum Monte Carlo calculations.