Direct evidence of high temperature superconductivity in one-unit-cell FeSe films on SrTiO3 substrate by transport and magnetization measurements*
Xing Yinga),b), Wang Jiana),b)
       
Arrhenius TAFF analysis. (a) Temperature dependence of resistance in different magnetic fileds. (b) ln[ R sq] vs. 1/ T in various perpendicular magnetic fields. The corresponding solid lines are fitting results from the Arrhenius relation. (c) Field dependence of U 0( H ). The solid lines are power-law fits using U 0( H ) ∼ H − γ . For this 1-UC FeSe film, γ = 0.14 for μ 0 H < 3.4 T, and γ = 0.60 for μ 0 H > 3.4 T.[ 33 ]