[1Cp01-13] 表面科学(構造)

[1Cp12S] Local effect of sqrt13xsqrt13 reconstruction on single-layer FeSe/SrTiO₃

*司 文¹、田中 友晃¹、一ノ倉 聖¹、平原 徹¹ (1. 東京工業大学大学院理学院)

Monolayer iron selenide (ML FeSe) on strontium titanate (STO) is a superconductor with Tc over 60K, in which the STO substrate plays an important role in the high Tc. To figure out the local effect of the STO surface reconstruction on ML FeSe, we use low temperature (5K) scanning tunneling microscopy/spectroscopy (STM/STS) to measure the correlation between the surface structure and the electronic state as well as the superconductivity of ML FeSe/STO -√13x√13. In the atomically-resolved STM images, we observed 1x1-only area, periodically arranged 'z'-like patterns, and dumbbell-like defects. The STS spectra have pabeen simultaneously measured in the corresponding regions on the surface and the details will be shown in the presentation.