We study the superconducting state of the two-dimensional electron gas (2DEG) at the LaAlO3/SrTiO3 interface using Josephson junctions as spectroscopic probes. The transport properties of these devices reveal the presence of two superconducting gap structures and of an unconventional superconducting ? channel. These features provide evidence of an unconventional superconducting ground state, possibly related to the interplay between superconductivity and the large Rashba spin-orbit coupling in the 2DEG.
Signatures of unconventional superconductivity in the LaAlO3 / SrTiO3 two-dimensional system
Stornaiuolo D;Massarotti D;Di Capua R;Lucignano P;Pepe GP;Salluzzo M;
2017
Abstract
We study the superconducting state of the two-dimensional electron gas (2DEG) at the LaAlO3/SrTiO3 interface using Josephson junctions as spectroscopic probes. The transport properties of these devices reveal the presence of two superconducting gap structures and of an unconventional superconducting ? channel. These features provide evidence of an unconventional superconducting ground state, possibly related to the interplay between superconductivity and the large Rashba spin-orbit coupling in the 2DEG.File in questo prodotto:
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