Superconducting gap symmetry of the noncentrosymmetric superconductor W3Al2C
Abstract
A detailed zero-field and transverse-field muon spin relaxation/rotation (μSR) experiemnts have been carried out on the recently discovered non-centrosymmetric superconductor W3Al2C to speculate about its superconducting ground state. Bulk nature of superconductivity below 7.6 K is confirmed through magnetization measurements. No change in the μSR spectra collected above and below Tc is visible, ruling out the possibility of spontaneous magnetic field below Tc. This confirms that time-reversal symmetry is preserved for W3Al2C upon entering in the superconducting ground state. Temperature dependent superfluid density [s(T)], which directly reflects the superconducting gap symmetry is obtained by the analysis of spectra obtained from the transverse-field μSR experiments. Despite a non-centrosymmetric structure, W3Al2C adopts a fully gaped spin-singlet superconducting ground state with a zero temperature value of gap 0 = 1.158(8) meV with gap-to-Tc ratio 20/kBTc≈3.54, classifying this material as a weakly-coupled superconductors.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.