Fig. 4
From: Giant thermoelectric power factor in ultrathin FeSe superconductor
Temperature dependence of Seebeck coefficient. a Seebeck coefficient α vs. temperature T in FeSe thin film (Sample B). The values of α were enhanced by the thickness reduction in all temperature regions. b α−T curves in representative Fe-based high-Tc superconductors. Ba(Fe0.9Co0.1)2As227, LaFeAs(O0.9F0.1)28, and La(Fe0.9Co0.1)AsO29 show the peak behavior at ~150 K, in a similar manner to the FeSe thin film in a. c Temperature dependence of α normalized by the peak value αpeak for FeSe thin films and bulk materials in b. Overall temperature variation of α is seemingly common for Fe-based superconductors
