Marginal Fermi Liquid

Figure 2(b) shows calculations [7] using a Marginal Fermi liquid with parameters chosen to reproduce p(T) for T > 200 K, combined with a commensurate (7r, 7r) SDW gap opening for T < 200 K. The T = 0 gap magnitude was adjusted to correctly locate the maximum in a at T = 0. The calculation is seen to reproduce the data fairly well [compare to Fig. 2(b)],... 

It is worth remarking that the above phenomenology leads one to conclude that the marginal Fermi liquid behavior hypothesized for the optimally doped samples (x 0.16) does not reflect quantum critical behavior. 

Fig. 11. (top) Broad, normal-state Raman continua in various oxide materials at room temperature (after Sugai et al. 1989). (bottom) Room-temperature Raman continuum in Bi2Sr2CaCu20j fit to a response involving the marginal and nested Fermi liquid scattering rate form (see eq. 26) (after Virosztek and Ruvalds 1992). 

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