Large magnetic penetration depth and thermal fluctuations in a superconducting Ca10(Pt3As8)[(Fe

Magnetic penetration-depth measurements of a suppressed superfluid density of superconducting Ca0.5Na0.5FeKim1, Haberkorn2, Graf3 et al. 2012Phys. Rev. BSelf Cite181180View full textAdd to dashboardCite

“…The magnetic stray field calibration was performed by imaging vortices in a Nb reference as a function of applied magnetic field. 24 Measurements of λ were performed using the Meissner response technique. [24][25][26] The Meissner response curves were first measured as a function of the tip-sample separation in the Nb reference with known λ(T ).…”

“…We use the magnetic force microscopy (MFM) technique to determine absolute values of λ(T ). [24][25][26][27][28] The CNFA single crystals, showing homogeneity, have been grown with a selfflux technique. Details of the sample preparation and characterization can be found elsewhere.…”

Field-induced magnetic transitions inCa10(Pt3As8)((Fe1−xPtxWatson1, McCollam2, Blake3 et al. 2014Phys. Rev. B191170View full textAdd to dashboardCite

“…3(d) does not suppress the superconducting transition to the same extent. This broaden- ing indicates strong thermal fluctuations of the vortex lattice, which can be quantified by the Ginzburg number Gi ≈ 0.16 [23], significantly higher than typical pnictides (using a large penetration depth of λ ab (0) ≈ 1000 nm [23] and combined with the measured upper critical field). In contrast with the inplane measurements, the inter-plane resistance (Fig.…”

Optical properties of optimally doped single-crystal Ca8.5La1.5(Pt3As8)(Seo1, Choi2, Kimura3 et al. 2017Phys. Rev. B116120View full textAdd to dashboardCite

“…And recent angle resolved photoemission spectroscopy (ARPES) experiment further suggested that this difference between two compounds could be developed by the number of the band-edge singularities 9 . In order to study this subtle relation between the electronic structure and superconductivity in these materials, various experiments have already been performed: such as transport 10 , pressure effect 11 , ARPES 7 , magnetic force microscope (MFM) 12 , upper critical field (H c2 ) 13 , nuclear magnetic resonance (NMR) 14 , and penetration depth λ(T ) 15 measurements, etc. However, the IR spectroscopy experiment has not yet been carried out with these compounds.…”