Magnetic field tuned superconductor-to-insulator transition at the LaAlO<inf>3</inf>/ SrTiO<inf>3</inf>interface
Permanent link to this recordhttp://hdl.handle.net/20.500.12613/5858
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Abstract© 2014 American Physical Society. We present a study of the magnetic field tuned superconductor-to-insulator transition (SIT) in the electron gas that forms at the LaAlO3/SrTiO3interface. We find that the magnetic field induces a transition into a weakly insulating state, as is observed for the electrostatically tuned SIT at this interface. Finite size scaling of the magnetoresistance yields the critical exponent product zν≃7/3, indicating that the transition is governed by quantum percolation effects. While such critical exponents have been reported previously for high resistance films, they have not been reported for a low resistance system like ours, with a maximum sheet resistance of ≈1.5 kΩ, much less than the quantum of resistance RQ≡h/4e2=6.45 kΩ.
Citation to related workAmerican Physical Society (APS)
Has partPhysical Review B - Condensed Matter and Materials Physics
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