Universal Conductance Fluctuations in Electrolyte-Gated SrTiO3 Nanostructures

Sam W. Stanwyck; P. Gallagher; J. R. Williams; David Goldhaber-Gordon

doi:10.1063/1.4832555

Universal Conductance Fluctuations in Electrolyte-Gated SrTiO3 Nanostructures

Mesoscale and Nanoscale Physics 2015-06-17 v1

Authors: Sam W. Stanwyck , P. Gallagher , J. R. Williams , David Goldhaber-Gordon

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Abstract

We report low-temperature magnetoconductance measurements of a patterned two-dimensional electron system (2DES) at the surface of strontium titanate, gated by an ionic liquid electrolyte. We observe universal conductance fluctuations, a signature of phase-coherent transport in mesoscopic devices. From the universal conductance fluctuations we extract an electron dephasing rate linear in temperature, characteristic of electron-electron interaction in a disordered conductor. Furthermore, the dephasing rate has a temperature-independent offset, suggestive of unscreened local magnetic moments in the sample.

Keywords

universal conductance fluctuations SrTiO3 two-dimensional electron system dephasing rate electron-electron interaction ionic liquid gating

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@article{arxiv.1309.1494,
  title  = {Universal Conductance Fluctuations in Electrolyte-Gated SrTiO3 Nanostructures},
  author = {Sam W. Stanwyck and P. Gallagher and J. R. Williams and David Goldhaber-Gordon},
  journal= {arXiv preprint arXiv:1309.1494},
  year   = {2015}
}

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4 pages, 3 figures

Universal Conductance Fluctuations in Electrolyte-Gated SrTiO3 Nanostructures

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