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Understanding the superconducting state at SrTiO3 interfaces

Event Details

Event Dates: 

Thursday, December 19, 2013 - 3:00pm

Seminar Location: 

  • Other

Seminar Location Other: 

Duane Physics, 11th floor Commons room

Speaker Name(s): 

A.V. Balatsky

Speaker Affiliation(s): 

Los Alamos, Nordita
Seminar Type/Subject

Scientific Seminar Type: 

  • Condensed Matter Seminar

Event Details & Abstract: 

We examine the modified electronic states and change in carrier density at the interfaces produced by global and local electric fields using a Ginzburg-Landau formalism and ab-initio calculations. We show that linear coupling of an electric potential can influence the superconducting order parameter and induce a transition to a superconducting phase.  We also suggest  that the interface superconductivity in STO may be explained through the realization of a weakly coupled two-band superconductor.

 

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Haraldsen et al., Phys. Rev. B 85, 134501 (2012),

Fernandeset al., Phys. Rev. B 87, 014510 (2013)