Superconductivity with extremely large upper critical fields in Nb2Pd0.81S5

Abstract

Here, we report the discovery of superconductivity in a new transition metal-chalcogenide compound, i.e. Nb2Pd0.81S5, with a transition temperature Tc > 6.6 K. Despite its relatively low Tc, it displays remarkably high and anisotropic superconducting upper critical fields, e.g. mu_0 H_{c2} (T approaching 0 K). 37 T for fields applied along the crystallographic b-axis. For a field applied perpendicularly to the b-axis, mu_0 H_{c2} shows a linear dependence in temperature which coupled to a temperature-dependent anisotropy of the upper critical fields, suggests that Nb2Pd0.81S5 is a multi-band superconductor. This is consistent with band structure calculations which reveal nearly cylindrical and quasi-one-dimensional Fermi surface sheets having hole and electron character, respectively. The static spin susceptibility as calculated through the random phase approximation, reveals strong peaks suggesting proximity to a magnetic state and therefore the possibility of unconventional superconductivity.

6 pages, 4 figures

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Cited by in corpus (12)

• Superconductivity in a Layered Ta4Pd3Te16 with PdTe2 Chains
• Controllable spin-orbit coupling and its influence on the upper critical field in the chemically doped quasi-one-dimensional Nb${}_2$PdS${}_5$ superconductor
• Pressure-induced superconductivity in quasi-one-dimensional semimetal ${\mathrm{Ta}}_2{\mathrm{PdSe}}_6$
• Multiband Te $p$ Based Superconductivity of Ta${}_4$Pd${}_3$Te${}_{16}$
• Nodeless superconductivity in quasi-one-dimensional Nb2PdS5: A muSR study
• Superconductivity at 4.4K in PdTe2-chains of a Ta Based Compound
• Two-dimensional superconductivity in a bulk single-crystal
• Multiband Semimetallic Electronic Structure of Superconducting Ta2PdSe5
• Evidence for nodal superconductivity in a layered compound Ta${}_4$Pd${}_3$Te${}_{16}$
• Fermi surface and band structure of BiPd from ARPES studies
• Valence band electronic structure of Pd based ternary chalcogenide superconductors
• Valence band electronic structure of Nb2Pd1.2Se5 and Nb2Pd0.95S5 superconductors