alexa Charge-Vortex Duality At The LAO/STO Interface
ISSN: 2169-0022

Journal of Material Sciences & Engineering
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3rd International Conference and Exhibition on Materials Science & Engineering
October 06-08, 2014 Hilton San Antonio Airport, USA

Venkat Chandrasekhar
Workshop: Material Sci Eng
DOI: 10.4172/2169-0022.S1.015
The conducting gas that forms at the interface between the two insulating oxides LaAlO3 (LAO) and SrTiO3 (STO) shows a rich variety of behavior, including an electric-field dependent conductivity, superconductivity, gate-controlled superconductor-to-insulator transition, and ferromagnetism. Recently, we showed for the first time the coexistence of superconductivity and ferromagnetism at the LAO/STO interface, which manifests itself as a superconducting phase diagram that is hysteretic in the applied magnetic field. We show that the coexistence of ferromagnetism and superconductivity enables a novel demonstration of the concept of charge-vortex duality in the superconductor-to-insulator transition, which shows up as a magnetic field sweep-rate dependence of the magnetoresistance in the superconducting and insulating regimes. If time permits, I will also talk about our more recent work on the magnetic field tuned superconductor-to-insulator transition in this system.
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