Imaging Se diffusion across the FeSe/SrTiO${}_3$ interface

Samantha O'Sullivan, Ruizhe Kang, Jules A. Gardener +3

Monolayer FeSe on SrTiO${}_3$ superconducts with reported $T_{\mathrm{c}}$ as high as 100 K, but the dramatic interfacial $T_{\mathrm{c}}$ enhancement remains poorly understood. Oxygen v…