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Jump in specific heat in the presence of a spin-density wave at the superconducting transition in iron pnictides
2011
Physical Review B
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We analyze the magnitude of the specific heat jump \Delta C at the superconducting transition temperature T_c in the situation when superconductivity develops in the pre-existing antiferromagnetic phase. We show that \Delta C/T_c differs from the BCS value and is peaked at the tri-critical point where this coexistence phase first emerges. Deeper in the magnetic phase, the onset of coexistence, T_c, drops and \Delta C/T_c decreases, roughly as \Delta C/T_c \propto T^2_c at intermediate T_c and
doi:10.1103/physrevb.84.140502
fatcat:tgxpbcau4jdcxmeoh7ic7cweoa