Specific heat jump at superconducting transition in the presence of Spin-Density-Wave in iron-pnictides

Abstract

We analyze the magnitude of the specific heat jump ΔC at the superconducting transition temperature T_c in the situation when superconductivity develops in the pre-existing antiferromagnetic phase. We show that ΔC/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 ΔC/T_c decreases, roughly as ΔC/T_c \propto T^2_c at intermediate T_c and exponentially at the lowest T_c, in agreement with the observed behavior of ΔC/T_c in iron-based superconductors.

4+ pages, 3 figures

References in corpus (13)

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Cited by in corpus (13)

• Superconductivity in Iron Compounds
• Enhancement of $T_c$ by disorder in underdoped iron pnictides
• Superconducting Properties of the $s^{\pm }$-wave state: Fe-based superconductors
• Phase diagram of iron-pnictides if doping acts as a disorder
• Enhancement of the London penetration depth in pnictides at the onset of SDW order under superconducting dome
• Gap nodes induced by coexistence with antiferromagnetism in iron-based superconductors
• Heat capacity jump at Tc and pressure derivatives of superconducting transition temperature in the Ba1-xKxFe2As2 (0.2 < x < 1.0) series
• Electronic band structure and momentum dependence of the superconducting gap in (Ca, Na)Fe2As2 from angle-resolved photoemission spectroscopy
• Superconducting specific heat jump $\Delta C_{\mathrm{el}}\propto T_c^{\beta }(\beta \approx 2)$ for K${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$
• Nodeless superconductivity in the presence of spin-density wave in pnictide superconductors: The case of BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Strong-Coupling Superconductivity in NaFe${}_{1-x}$Co${}_x$As: the Eliashberg Theory and Beyond
• Effect of SDW fluctuations on the specific heat jump in iron pnictides at a superconducting transition
• Magnetic penetration depth in the presence of a spin-density wave in multiband superconductors at zero temperature