Spin-Orbit Ordering, Momentum Space Coexistence, and Cuprate Superconductivity

Details Spin-Orbit Ordering, Momentum Space Coexistence, and Cuprate Superconductivity Spin-Orbit Ordering, Momentum Space Coexistence, and Cuprate Superconductivity

2003-12-29

arxiv.org/abs/cond-mat/0312685v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

Motivated by the energetic advantage of achieving coherent enhancement of effective spin-dependent interactions through approximate nesting, we propose specific forms of spin ordering, whose form varies over the Fermi surface, for the cuprate superconductors. Competing "spin-orbit" orderings involving order parameters in spatial $d_{x^2-y^2}$ and $d_{xy}$ waves at commensurate and incommensurate wavevectors, phase separated in momentum space, support behavior suggestive of observed phenomena. The $d_{xy}$ spin-orbit fluctuation induces an effective interaction that favors $d_{x^2-y^2}$-wave pairing, as required for the observed superconductivity. Anisotropic spin susceptibility is a crucial prediction of our mechanism.

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