Magnetic and superconducting transitions in Ba$_{1-x}$K$_x$Fe$_{2}$As$_{2}$ studied by specific heat

Details Magnetic and superconducting transitions in Ba$_{1-x}$K$_x$Fe$_{2}$As$_{2}$ studied by specific heat Magnetic and superconducting transitions in Ba$_{1-x}$K$_x$Fe$_{2}$As$_{2}$ studied by specific heat

2009-10-02

arxiv.org/abs/0910.0389v1

Phys. Rev. B 81, 014529 (2010)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures, 2 tables

Scientific paper

10.1103/PhysRevB.81.014529

We report on specific heat measurements in Ba$_{1-x}$K$_x$Fe$_{2}$As$_{2}$ ($x\le 0.6$). For the underdoped sample with $x=0.2$ both the spin-density-wave transition at $T = 100$ K and the superconducting transition at 23 K can be identified. The electronic contribution to the specific heat in the superconducting state for concentrations in the vicinity of optimal doping $x=0.4$ can be well described by a full single-gap within the BCS limit.

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