Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 53: Low-Dimensional Systems: 1D - Theory
TT 53.6: Vortrag
Mittwoch, 9. März 2016, 16:15–16:30, H23
Tomonaga-Luttinger to Luther-Emery crossover in spin-gapped metals — Jonas Greitemann1,3, Stephan Hesselmann1, Stefan Wessel1, Fakher Assaad2, and •Martin Hohenadler2 — 1RWTH Aachen, Germany — 2University of Würzburg, Germany — 3LMU Munich, Germany
We consider the crossover between the gapless Tomonaga-Luttinger and the spin-gapped Luther-Emery fixed point as a function of distance in models with attractive backscattering. Our quantum Monte Carlo results for extended Hubbard and Holstein models reveal the impact of this crossover on correlation functions, Luttinger parameters, and critical values for the charge-density-wave transition. The implications for our understanding of the Holstein-Hubbard model are discussed.