Muon-spin-spectroscopy study of the penetration depth of FeTe0.5Se0.5
P.K. Biswas, G. Balakrishnan, D.M. Paul, C.V. Tomy, M.R. Lees, and, A.D. Hillier
TL;DR
This study uses muon spin spectroscopy to investigate the superconducting properties of FeTe0.5Se0.5, focusing on the temperature dependence of the magnetic penetration depth and its implications for the superconducting gap structure.
Contribution
It provides the first detailed muon spin spectroscopy analysis of FeTe0.5Se0.5's penetration depth, suggesting possible s+s wave or anisotropic s-wave pairing symmetry.
Findings
Lambda_ab(0) = 534 nm at zero temperature
Temperature dependence compatible with two-gap or anisotropic s-wave models
Supports complex pairing mechanisms in FeTe0.5Se0.5
Abstract
Muon spin spectroscopy measurements have been used to study the superconducting state of FeTe0.5Se0.5. The temperature dependence of the in-plane magnetic penetration depth, lambda_ab(T), is found to be compatible with either a two gap s+s wave or an anisotropic s-wave model. The value for lambda_ab(T) at T=0 K is estimated to be lambda_ab(0)=534(2)nm.
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