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Anisotropy of upper critical fields and thermally-activated flux flow of quenched KxFe2-ySe2 single crystals
Hechang Lei, C. Petrovic
We report the anisotropy of the upper critical fields mu0Hc2(T) and thermally-activated flux flow (TAFF) behavior of quenched KxFe2-ySe2. Even though the post-annealing and quenchi…
Lateral imaging of the superconducting vortex lattice using Doppler-modulated scanning tunneling microscopy
I. Fridman, C. Kloc, C. Petrovic +1
By spatially mapping the Doppler effect of an in-plane magnetic field on the quasiparticle tunneling spectrum, we have laterally imaged the vortex lattice in superconducting 2H-NbS…
Giant increase in critical current density of KxFe2-ySe2 single crystals
Hechang Lei, C. Petrovic
By using post-annealing and quenching technique, we show that the critical current density Jc,ab of KxFe2-ySe2 single crystals can be enhanced more than one order of magnitude up t…
Critical fields, thermally-activated transport and critical current density of beta-FeSe single crystals
Hechang Lei, Rongwei Hu, C. Petrovic
We present critical fields, thermally-activated flux flow (TAFF) and critical current density of tetragonal phase beta-FeSe single crystals. The upper critical fields Hc2(T) for H|…
Synthesis, crystal structure and magnetism of beta-Fe1.00(2)Se1.00(3) single crystals
Rongwei Hu, Hechang Lei, Milinda Abeykoon +5
Understanding iron based superconductors requires high quality impurity free single crystals. So far they have been elusive for beta-FeSe and extraction of intrinsic materials prop…
Evolution of correlation strength in KxFe(2-y)Se2 superconductor doped with S
Kefeng Wang, Hechang Lei, C. Petrovic
We report the evolution of thermal transport properties of iron-based superconductor KFeSe with sulfur substitution at Se sites. Sulfur doping suppresses the superc…