The two-dimensional electron gas (2DEG) at the LaAlO3/SrTiO3 interface exhibits gate-tunable superconductivity with a domelike shape of TC as a function of electron concentration.
Here, we propose that the experimentally observed behavior can be explained as a direct effect of the dominant extended s−wave symmetry of the superconducting gap.
Our results agree very well with the experimental data. As shown, neither the correlation effects nor the spin-orbit coupling significantly influence the physical picture of the paired state stemming from our analysis.
Paweł Wójcik
Wydział Fizyki i Informatyki Stosowanej
Akademia Górniczo-Hutnicza w Krakowie
budynek D7 (WFiIS), pok. 3.17, tel. 53-38
e-mail: pawel.wojcik@fis.agh.edu.pl