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Because $\\mathrm{Tr}\\,\\Pi=1$, the three principal Knight shifts at $T=0$ lie on a two-dimensional simplex of locking textures, the \\e","authors_text":"Yi Zhou","cross_cats":["cond-mat.str-el"],"headline":"The zero-temperature Knight shift tensor in noncentrosymmetric superconductors equals the normal-state susceptibility times the identity minus the Fermi-surface projector of the spin-locking direction.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2026-05-16T14:58:32Z","title":"Bogoliubov sum rules and the Knight-shift ellipsoid in noncentrosymmetric superconductors"},"references":{"count":92,"internal_anchors":1,"resolved_work":92,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"to the vertex (0,0,1) of the simplex in Fig. 3. This one-parameter curve is the explicit base- line tested later by Protocol F and by the worked example of Sec. XIV. XI. 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