CIAR Superconductivity Program. Spin dynamics in cuprate superconductors. T. E. Mason Spallation Neutron Source Project. Harrison Hot Springs Dec. 9, 2000. Neutron Scattering and Spin Fluctuations. excitations characterized by c ´´( Q , w ) è a measure of absorption at ( Q , w ).
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S(Q,w) ~ c´´(Q,w) [n(w)+1].
Vaknin et al (1987)
(Hayden et al, 1991)
(Hayden et al, 1990)
The inset shows c´´P/w vs T varying with an exponent of 3: for z=1 this implies h=0. Ambiguity because of ko.
Temperature and energy dependence of c´´ for the metallic samples suggests proximity to T=0 QCP.