Unconventional superconductivity in weakly correlated, non-centrosymmetric $\mathrm{M}{\mathrm{o}}_3\mathrm{A}{\mathrm{l}}_2\mathrm{C}$

Abstract

Electrical resistivity, specific heat and NMR measurements classify non-centrosymmetric $\mathrm{M}{\mathrm{o}}_3\mathrm{A}{\mathrm{l}}_2\mathrm{C}$ ($\beta$-Mn type, space group $P{4}_{1}32$) as a strong-coupled superconductor with $T_c=9$~K deviating notably from BCS-like behaviour. The absence of a Hebbel-Slichter peak, a power law behaviour of the spin-lattice relaxation rate (from ${}^{27}$Al NMR), a $T^3$ temperature dependence of the specific heat and a pressure enhanced $T_c$ suggest unconventional superconductivity with a nodal structure of the superconducting gap. Relativistic DFT calculations reveal a splitting of degenerate electronic bands due to the asymmetric spin-orbit coupling, favouring a mix of spin-singlet and spin triplet components in the superconducting condensate, in absence of strong correlations among electrons.

4 pages, 5 figures

References in corpus (9)

• Heavy fermion superconductivity and magnetic order in non-centrosymmetric $CeP{t}_{3}Si$
• Superconducting 2D system with lifted spin degeneracy: Mixed singlet-triplet state
• Superconductivty without inversion symmetry: MnSi versus CePt_3Si
• Saturation of electrical resistivity
• S-wave/spin-triplet order in superconductors without inversion symmetry: Li${}_2$Pd${}_3$B and Li${}_2$Pt${}_3$B
• Structure and physical properties of the noncentrosymmetric superconductor Mo3Al2C
• Nuclear Magnetic Relaxation Rate in a Noncentrosymmetric Superconductor
• Triplet Cooper Pair Formation by Anomalous Spin Fluctuations in Non-centrosymmetric Superconductors
• Density of States and NMR Relaxation Rate in Anisotropic Superconductivity with Intersecting Line Nodes

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