Pairing theory for striped superconductors

Florian Loder

Universität Augsburg, Institut für Physik, Augsburg, Germany

Striped high-Tc superconductors such as LaBaCuO4 show a fascinating competition between spin and charge order on one handside and superconductivity on the other handside. 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 developed an effective mean-field model by merging the theory of electron pairing with finite center-of-mass momentum with the antiferromagnetism known to coexist with d-wave superconductivity in systems with disorder. I will show that our model reproduces the key properties observed in experiments such as the formation of the antiferromagntic stripe pattern at ⅞ band filling or the quasi one-dimensional Fermi-surface observed by ARPES measurements.

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