Competition of Orbital Antiferromagnetism With Q-Triplet-Pairing in the Ferromagnetic Superconductor UGe2
G. Varelogiannis, P. Thalmeier, S. Tsonis
Abstract
Within a multicomponent BCS-like framework we study the coexistence and competition of various CDW and SC order parameters in the presence of a strong ferromagnetic background. We find that the competition of unconventional CDW, also called orbital antiferromagnet, with SC at finite momentum ( Q-triplet pairing) shows unique characteristics like an extreme sensitivity on the deviations from nesting. We argue that pressure in UGe2 creates deviations from the nesting and report a phase diagram in qualitative agreement with the observed behavior of UGe2.
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