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Dynamics of the Superconducting Two-Dimensional Electron Gas at LaTiO3/SrTiO3 Interface

The two-dimensional diffusive metal stabilized at the interface of SrTiO3 and the Mott Insulator LaTiO3has challenged many notions related to the formation and electronic behavior of the two-dimensional electron gas (2DEG) at the well studies LaAlO3-SrTiO3 interface. Here we discuss the stability of the superconducting phase at LaTiO3 – SrTiO3 interface and the nature of the superconductor – normal metal quantum phase transition driven by magnetic field and how this transition is initiated when the extent of Coulomb interaction amongst charge carriers is modulated by electrostatic gating. The nature of the superconducting condensate and its phase stiffness are discussed in the light of the Ti - t2g orbital driven bands and their filling in the presence of a strong Rashba spin – orbit interaction.

*1. Advanced Materials 22, 4448(2010), 2. Phys. Rev. B 86, 075127(2012), 3. Nature Communications, 1, 89(2010), 3. Phys. Rev. B (Rapid Communication) 90, 081107(2014). 4. Phys. Rev. B 94, 115165 (2016), 5. Phys. Rev. B 96, 024509(2017), 6.  Nature Commun. DOI: 10.1038/s41467-018-02907-8.


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Ramesh Budhani (Morgan State University)

Created October 22, 2018, Updated November 2, 2018