2018
DOI: 10.1103/physrevb.97.104509
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Anisotropic two-gap superconductivity and the absence of a Pauli paramagnetic limit in single-crystalline LaO0.5F0.5BiS2

Abstract: Ambient-pressure-grown LaO0.5F0.5BiS2 with a superconducting transition temperature Tc ∼ 3 K possesses a highly anisotropic normal state. By a series of electrical resistivity measurements with a magnetic field direction varying between the crystalline c-axis and the ab-plane, we present the first datasets displaying the temperature dependence of the out-of-plane upper critical field H ⊥ c2 (T ), the in-plane upper critical field H / / c2 (T ), as well as the angular dependence of Hc2 at fixed temperatures for… Show more

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Cited by 20 publications
(18 citation statements)
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References 59 publications
(69 reference statements)
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“…The T c defined as the midpoint of the transition is 3.2 K and 4.1 K for x = 0.22 and 0.69, respectively; the higher Se concentration causes the higher T c . A weak upward behaviour was observed for x = 0.22 and 0.69, which is similar to previous reports 34 . The amplitude of the upturn behaviour at low temperatures was suppressed by the Se substitution.…”
Section: Resultssupporting
confidence: 92%
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“…The T c defined as the midpoint of the transition is 3.2 K and 4.1 K for x = 0.22 and 0.69, respectively; the higher Se concentration causes the higher T c . A weak upward behaviour was observed for x = 0.22 and 0.69, which is similar to previous reports 34 . The amplitude of the upturn behaviour at low temperatures was suppressed by the Se substitution.…”
Section: Resultssupporting
confidence: 92%
“…Moreover, the out-of-plane orbital limit also deviates from the WHH curves (see the inset of Fig. 4 ), which is consistent with a previous report 27 , 34 . For another pair-breaking effect, the Pauli limit is estimated from the relation .…”
Section: Resultssupporting
confidence: 92%
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