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Related Concept Videos

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A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Updated: May 30, 2026

Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
11:54

Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures

Published on: February 8, 2018

Superconductivity at the LaAlO(3)/SrTiO(3) interface.

S Gariglio1, N Reyren, A D Caviglia

  • 1DPMC, University of Geneva, 24 Quai E.-Ansermet 1211 Genève 4, Switzerland.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|August 10, 2011
PubMed
Summary
This summary is machine-generated.

We characterized LaAlO(3)/SrTiO(3) interfaces, observing metallic conduction and 2D superconductivity at 200 mK. This research explores the electronic properties of oxide heterostructures.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Surface Science

Background:

  • The LaAlO(3)/SrTiO(3) interface is a key system for studying emergent electronic properties in oxide heterostructures.
  • Understanding the interface's structural and electronic characteristics is crucial for developing novel electronic devices.

Purpose of the Study:

  • To structurally characterize the LaAlO(3)/SrTiO(3) interface.
  • To investigate the transport properties, including metallic conduction and superconductivity, at this interface.

Main Methods:

  • Pulsed laser deposition (PLD) was used to grow LaAlO(3) films on SrTiO(3) substrates.
  • Transport measurements, including resistance and Hall effect, were performed to determine carrier density and mobility.
  • Superconducting transition temperature was measured using low-temperature electrical transport.

Main Results:

  • Metallic conduction was induced at the LaAlO(3)/SrTiO(3) interface.
  • Sheet carrier densities ranged from 0.4 to 1.2 × 10^14 electrons/cm^2.
  • A superconducting state was observed below approximately 200 mK, exhibiting characteristics of two-dimensional (2D) superconductivity.

Conclusions:

  • The LaAlO(3)/SrTiO(3) interface exhibits tunable electronic properties, including metallic behavior and superconductivity.
  • The observed 2D superconductivity opens avenues for exploring quantum phenomena in oxide systems.
  • Further research can focus on manipulating these properties for advanced electronic applications.