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Research Highlight | Materials Science Division

Instability of the electric transport in superconductors

In a study published in Scientific Reports, researchers demonstrated that in two-dimensions the emergence of an instability is a hallmark of Berezinskii-Kosterlitz-Thouless transition they detected by transport measurements of titanium nitride films.

Scientific Achievement

We develop a theory of inherent non-thermal superconducting electronic instabilities.

Significance and Impact

Our result provides key insights into the origin of switching voltage instabilities in superconductors.

Research Details

  • A theory is constructed in the framework of the time-dependent Ginzburg-Landau equation.
  • The S-shape of the I-V curves is generated by superconducting fluctuations.
  • In 2D superconductors, the Berezinskii-Kosterlitz-Thouless transition is accompanied – and can be identified – by the voltage switching jumps.

DOI10.1038/s41598-018-32302-8

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