Directional-dependent Berezinskii-Kosterlitz-Thouless transition at EuO/KTaO${}_3$(111) interfaces

Zongyao Huang, Zhengjie Wang, Xiangyu Hua +10

In two dimensions, a phase-coherent superconducting state is established via a Berezinskii-Kosterlitz-Thouless (BKT) transition, whose critical temperature $T_{\mathrm{BKT}}$ is determi…