[20p-B202-1~16] 11.1 Fundamental properties

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)

[20p-B202-13] Superconducting properties of the mechanically exfoliated strain-free Fe(Se,Te) film

〇(M1)Ren Masuda¹, Kai Walther², Alexandra Jung², Alberto Martinelli³, Jens Haenisch², Kazumasa Iida¹ (1.Nihon Univ., 2.Karlsruhe Institute of Tech., 3.CNR-SPIN)

Keywords:

Iron-based superconductors,strain-free thin films

The physical properties of the iron-based superconducting thin films are known to be affected by the strain from the substrate. Generally, a bulk single crystal has been used as the unstrained reference sample. However, bulk single crystals are grown in equilibrium states, in contrast to thin films. Therefore, the comparison of a bulk single crystal with a thin film is not appropriate. In this study, the Fe(Se,Te) thin film grown by pulsed laser deposition was peeled off from the substrate to create a strain-free thin film. The superconducting transition temperature T_c of the strain-free thin film was ~14 K and the as-grown film showed a T_c of ~17 K.