Wednesday, May 22, 2013

1305.4670 (Rafael M. Fernandes et al.)

How many quantum phase transitions exist inside the superconducting dome
of the iron pnictides?

Rafael M. Fernandes, Saurabh Maiti, Peter Wölfle, Andrey V. Chubukov
Recent experiments on two iron-pnictide families suggest the existence of a single quantum phase transition (QPT) inside the superconducting dome despite the fact that two separate transition lines - magnetic and nematic - cross the superconducting dome at $T_{c}$. Here we argue that these two observations are actually consistent. We show, using a microscopic model, that each order coexists with superconductivity for a wide range of parameters, and both transition lines continue into the superconducting dome below $T_{c}$. However, at some $T_{\mathrm{merge}}View original:

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