Dresden 2014 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 79: Correlated Electrons - Poster Session
TT 79.71: Poster
Wednesday, April 2, 2014, 15:00–19:00, P2
Competing order in correlated electron systems made simple — Jing Wang1,2, •Andreas Eberlein1, and Walter Metzner1 — 1Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany — 2Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
We derive an efficient and unbiased method for computing order parameters in correlated electron systems with competing instabilities. Charge, magnetic and pairing fluctuations above the energy scale of spontaneous symmetry breaking are taken into account by a functional renormalization group flow, while the formation of order below that scale is treated in mean-field theory. The method captures fluctuation driven instabilities such as d-wave superconductivity. As a first application we study the competition between antiferromagnetism and superconductivity in the ground state of the two-dimensional Hubbard model.