The Iron Pnictide Superconductors by Ferdinando Mancini & Roberta Citro

Author:Ferdinando Mancini & Roberta Citro
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(3.194)

Consequently the Raman response function in the channel, given by (3.191), should have a maximum rather than a divergence at the nematic phase transition, in the case where magnetic and structural phase transitions are separated [66, 69, 98].

A similar type of re-summation to that presented above has also been performed in [68] for the channel.

Fig. 3.11The initial slope of the Raman response function in the channel plotted as a function of temperature T, for the doping level (for which the structural and magnetic transitions are separated). The maximum of the Raman response function coincides with the structural transition temperature at as deduced by the appearance of twin boundaries [73]. One should also note that the Raman response function falls of rapidly inside the nematic phase (), and the signal disappears around the magnetic transition temperature

Experimental data taken from [73]

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