Possible multiband superconductivity in the quaternary carbide YRe2SiC

Abstract

We report for the first time the occurrence of superconductivity in the quaternary silicide carbide YRe2SiC with Tc = 5.9 K. The emergence of superconductivity was confirmed by means of magnetic susceptibility, electrical resistivity, and heat capacity measurements. The presence of a well developed heat capacity feature at Tc confirms that superconductivity is a bulk phenomenon, while a second feature in the heat capacity near 0.5 Tc combined with the unusual temperature dependence of the upper critical field Hc2(T) indicate the presence of a multiband superconducting state. Additionally, the linear dependence of the lower critical field Hc1 with temperature resemble the behavior found in compounds with unconventional pairing symmetry. Band structure calculations reveal YRe2SiC could harbor a non-trivial topological state and that the low-energy states occupy multiple disconnected sheets at the Fermi surface, with different degrees of hybridization, nesting, and screening effects, therefore making unconventional multiband superconductivity plausible.

arXiv comment17 pages, 5 figures

References in corpus (21)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Topological nodal line semimetals with and without spin-orbital coupling
• Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
• Topological nodal line semimetals
• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• Upper critical field pecularities of superconducting YNi2B2C and LuNi2B2C
• Topological Nodal Line Semimetals in CaP3 family of materials
• Limits of the upper critical field in dirty two-gap superconductors
• Specific heat of single crystal MgB_2: a two-band superconductor with two different anisotropies
• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• Non-symmorphic band degeneracy at the Fermi level in ZrSiTe
• Lower Critical Field at Odds with A S-Wave Superconductivity in The New Superconductor $Mg{B}_2$
• Highly anisotropic superconducting gaps and possible evidence of antiferromagnetic order in FeSe single crystals
• Electronic Structure and Upper Critical Field of Superconducting Ta${}_2$PdS${}_5$
• Topological nodal lines and hybrid Weyl nodes in YCoC${}_2$
• Vortex Response and Critical Fields observed via rf penetration depth measurements on the superconductor YNi_2B_2C
• The Critical Magnetic Field of Anisotropic Two-Band Magnetic Superconductors
• Two-band superconductivity with unconventional pairing symmetry in HfV${}_2$Ga${}_4$
• Insights on unconventional superconductivity in HfV${}_2$Ga${}_4$ and ScV${}_2$Ga${}_4$ from first principles electronic structure calculations
• Multiband Semimetallic Electronic Structure of Superconducting Ta2PdSe5

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