Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 2: SC: Properties, Electronic Structure, Mechanisms 1
TT 2.5: Vortrag
Montag, 14. März 2011, 11:30–11:45, HSZ 301
Pairing theory of striped superconductivity — •Florian Loder, Arno P. Kampf, Thilo Kopp, and Siegfried Graser — Center for Electronic Correlations and Magnetism, Institute of Physics, D-86135 Augsburg, Germany
Striped high-Tc superconductors such as La7/8Ba1/8CuO4 show a fascinating competition between spin and charge order on the one hand and superconductivity on the other. A theory for these systems therefore has to capture both the spin correlations in an antiferromagnet and the pair-correlation of a superconductor. For this purpose we have developed an effective Hartree-Fock theory by merging electron pairing with finite center-of-mass momentum and antiferromagnetism. We show that this theory reproduces the key experimental features such as the formation of the antiferromagnetic stripe patterns at 7/8 band filling or the quasi one-dimensional electronic structure observed by photoemission spectroscopy.