Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 63: Low-Dimensional Systems: 2D - Theory
TT 63.2: Vortrag
Donnerstag, 10. März 2016, 09:45–10:00, H21
Coexistence of incommensurate magnetism and superconductivity in the two-dimensional Hubbard model — Hiroyuki Yamase1,2, •Andreas Eberlein1,3, and Walter Metzner1 — 1Max Planck Institute for Solid State Research, Stuttgart, Germany — 2National Institute for Materials Science, Tsukuba, Japan — 3Department of Physics, Harvard University, Cambridge, USA
We analyze the competition of magnetism and superconductivity in the two-dimensional Hubbard model with a moderate interaction strength, including the possibility of incommensurate spiral magnetic order. Using an unbiased renormalization group approach, we compute magnetic and superconducting order parameters in the ground state. In addition to previously established regions of Néel order coexisting with d-wave superconductivity, the calculations reveal further coexistence regions where superconductivity is accompanied by incommensurate magnetic order.