Magnetic and superconducting transitions in Ba₁₋ₓKₓFe₂As₂ studied by specific heat
Kant, Ch. · Deisenhofer, J. · Günther, A. · Schrettle, F. · Rotter, M. · Johrendt, D. · Loidl, A.
Original · EN
We report on specific heat measurements in Ba₁₋ₓKₓFe₂As₂ (x≤ 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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