Effect of electrostatic confinement on the dome-shaped superconducting phase diagram at the LaAlO/SrTiO interface.

The two-dimensional electron gas (2DEG) at the LaAlO[Formula: see text]/SrTiO[Formula: see text] (LAO/STO) interface exhibits gate-tunable superconductivity with a dome-like shape of critical temperature as a function of electron concentration. This behavior has not been unambiguously explained yet. Here, we develop a microscopic model based on the Schrödinger-Poisson approach to determine the electronic structure of the LAO/STO 2DEG, which we then apply to study the principal characteristics of the superconducting phase within the real-space pairing mean-field approach.