Heavily doped semiconductors, which can exhibit superconductivity, and low-dimensional superconducting thin films are currently limited by interface scattering, electronic or atomic-scale disorder. Here, the fabrication of a high-quality superconducting layer within a thin-film heterostructure based on SrTiO3 is reported. By selectively doping a narrow region of SrTiO3 a two-dimensional superconductor is formed that should provide a model system in which to explore the quantum transport and interplay of both superconducting and normal electrons.
- Y. Kozuka
- M. Kim
- H. Y. Hwang
