Theoretical Analysis on Electromagnetic Properties of the Superconducting LaAlO3/SrTiO3 Interface

The origin of superconductivity and pairing symmetry of order parameter in the LaAlO 3 /SrTiO 3 interface are still elusive problems up to now. Based on the two-band Ginzburg-Landau theory, we study the electromagnetic properties of this oxide heterostructure with the Neumann boundary conditions. We...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2022-12, Vol.35 (12), p.3497-3504
Main Authors: Ye, Chen-Xiao, Che, Jian-Tao, Han, Tian-Yi, Huang, Hai
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
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Summary:The origin of superconductivity and pairing symmetry of order parameter in the LaAlO 3 /SrTiO 3 interface are still elusive problems up to now. Based on the two-band Ginzburg-Landau theory, we study the electromagnetic properties of this oxide heterostructure with the Neumann boundary conditions. We calculate the temperature dependence of upper critical field in arbitrary direction and critical supercurrent density through the interface. We also compute the upper critical field and superfluid stiffness at different gate voltages. Our theoretical results are in good agreement with the experimental data, which strongly suggests the existence of two-gap s -wave superconductivity in this electron system.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-022-06390-7