Residual spin susceptibility in the spin-triplet, orbital-singlet model
Abstract
Nuclear magnetic resonance (NMR) and Knight shift measurements are critical tools in the identification of spin-triplet superconductors. We discuss the effects of spin orbit coupling on the Knight shift and susceptibilities for a variety of spin triplet multi-orbital gap functions with orbital-singlet character and compare their responses to "traditional" single band spin-triplet (px+ipy) superconductors. We observe a non-negligible residual spin-susceptibility at low temperature.
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