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Related Experiment Videos

Superconducting interfaces between insulating oxides.

N Reyren1, S Thiel, A D Caviglia

  • 1Département de Physique de la Matière Condensée, University of Geneva, 24 quai Ernest-Ansermet, 1211 Genève 4, Switzerland.

Science (New York, N.Y.)
|August 4, 2007
PubMed
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Superconductivity was discovered in the electron gas at the interface of two insulating oxides, LaAlO3 and SrTiO3. This two-dimensional superconductor is confined to a thin layer, with a transition temperature around 200 millikelvin.

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Solid-State Chemistry

Background:

  • Complex oxide interfaces can exhibit novel electronic properties.
  • Interfaces between perovskite oxides are a key area of research for emergent phenomena.

Purpose of the Study:

  • To investigate the electronic properties of the interface between LaAlO3 and SrTiO3.
  • To determine if superconductivity exists at this oxide interface.

Main Methods:

  • Fabrication of heterostructures from insulating perovskite oxides LaAlO3 and SrTiO3.
  • Characterization of the electron gas formed at the interface.

Main Results:

  • Observation of superconductivity in the two-dimensional electron gas at the LaAlO3/SrTiO3 interface.

Related Experiment Videos

  • Superconducting transition temperature measured at approximately 200 millikelvin.
  • The superconducting layer thickness is limited to approximately 10 nanometers.

    • Conclusions:

    • The interface between LaAlO3 and SrTiO3 hosts a two-dimensional superconductor.
    • This finding opens new avenues for research in oxide electronics and low-temperature physics.