Direct evidence of high temperature superconductivity in one-unit-cell FeSe films on SrTiO<sub>3</sub> substrate by transport and magnetization measurements<xref ref-type="fn" rid="cpb151551fn1">*</xref>

Direct evidence of high temperature superconductivity in one-unit-cell FeSe films on SrTiO₃ substrate by transport and magnetization measurements*

Xing Ying^a),^b), Wang Jian^a),^b)

(a) STM image of a typical 1-UC FeSe film. The steps originate from the STO substrate and the inset shows the atomic-resolution image. (b) The high-angle annular dark field STEM image of a (10-UC)FeTe/(1-UC)FeSe/STO heterostructure, showing two very sharp interfaces. (c) The line profile corresponding to the blue line in panel (b), confirming the distinct FeTe cover layer, the FeSe film, and the SrTiO₃ substrate.^{[ 23 ]}