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Temperature dependence of the lower critical field Hc1(T) evidences nodeless superconductivity in FeSe

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Academic year: 2021

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Figure

FIG. 1: (a) Magnetic field dependence of the isothermal mag- mag-netization M vs. H loops measured at different temperatures ranging from 2 to 8 K up to 40 kOe with the field parallel to both c axis and ab plane as an inset
FIG. 2: The upper panel shows the superconducting initial part of the magnetization curves measured of β-FeSe single crystals at various temperatures for H k c
FIG. 3: The lower critical fields of FeSe single crystal for the field applied parallel to c axis
FIG. 4: Upper panel: The temperature dependence of the London penetration depth, λ −2 ab (T ), for FeSe
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